From f1e5a5d1edb993d198a40c98bad3624bcd22a62d Mon Sep 17 00:00:00 2001
From: Brandon Charleson <170791+bcharleson@users.noreply.github.com>
Date: Thu, 13 Nov 2025 14:02:07 -0800
Subject: [PATCH 01/14] fix: update all hardcoded version numbers to 1.2.0 and
 protocol to 2025-06-18

- Updated Server header from 1.1.0 to 1.2.0
- Updated /health endpoint version and protocol
- Updated /info endpoint version and protocol
- Updated /authorize endpoint version
- Updated GET /mcp endpoint version and protocol
- Updated 404 handler protocol version

Ensures complete version consistency across all HTTP endpoints and responses.
---
 src/streaming-http-transport.ts | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/src/streaming-http-transport.ts b/src/streaming-http-transport.ts
index 6835859..e80cd2b 100644
--- a/src/streaming-http-transport.ts
+++ b/src/streaming-http-transport.ts
@@ -176,7 +176,7 @@ export class StreamingHttpTransport {
         'X-Content-Type-Options': 'nosniff',
         'X-Frame-Options': 'DENY',
         'X-XSS-Protection': '1; mode=block',
-        'Server': 'instantly-mcp/1.1.0'
+        'Server': 'instantly-mcp/1.2.0'
       });
       next();
     });
@@ -299,10 +299,10 @@ export class StreamingHttpTransport {
       res.json({
         status: 'healthy',
         service: 'instantly-mcp',
-        version: '1.1.0',
+        version: '1.2.0',
         transport: 'dual-protocol',
         protocols: {
-          streamable_http: '2025-03-26',
+          streamable_http: '2025-06-18',
           sse: '2024-11-05'
         },
         timestamp: new Date().toISOString(),
@@ -323,11 +323,11 @@ export class StreamingHttpTransport {
     this.app.get('/info', (req, res) => {
       res.json({
         name: 'Instantly MCP Server',
-        version: '1.1.0',
+        version: '1.2.0',
         description: 'Official Instantly.ai MCP server with 34 email automation tools',
         transport: 'streaming-http',
         endpoint: 'https://mcp.instantly.ai/mcp',
-        protocol: '2025-03-26',
+        protocol: '2025-06-18',
         tools: 34,
         capabilities: {
           tools: true,
@@ -571,7 +571,7 @@ export class StreamingHttpTransport {
       // Return MCP server capabilities instead of OAuth flow
       res.json({
         server: 'instantly-mcp',
-        version: '1.1.0',
+        version: '1.2.0',
         protocol: 'mcp',
         transport: 'streamable-http',
         auth: {
@@ -652,9 +652,9 @@ export class StreamingHttpTransport {
       // Return server info for GET requests
       res.json({
         server: 'instantly-mcp',
-        version: '1.1.0',
+        version: '1.2.0',
         transport: 'streamable-http',
-        protocol: '2025-03-26',
+        protocol: '2025-06-18',
         endpoints: {
           'mcp_post': apiKey ? `/mcp/${apiKey}` : '/mcp',
           'messages_post': '/messages',
@@ -867,7 +867,7 @@ export class StreamingHttpTransport {
         message: `Endpoint ${req.path} not found`,
         availableEndpoints: ['/mcp', '/mcp/{API_KEY}', '/authorize', '/health', '/info'],
         transport: 'streamable-http',
-        protocol: '2025-03-26'
+        protocol: '2025-06-18'
       });
     });
   }

From 3149b7001874bd9d3c9ad4255e6752143cdb29ae Mon Sep 17 00:00:00 2001
From: Brandon Charleson <170791+bcharleson@users.noreply.github.com>
Date: Thu, 13 Nov 2025 14:12:17 -0800
Subject: [PATCH 02/14] fix: add additionalProperties to nested objects in
 update_account schema

- Added additionalProperties: false to warmup object
- Added additionalProperties: false to warmup.advanced object

This resolves MCP schema validation errors in strict clients like Augment and Cursor
that were causing tools to be disabled with 'validation errors' message.
---
 src/tools/account-tools.ts | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/tools/account-tools.ts b/src/tools/account-tools.ts
index c3e5339..b6af946 100644
--- a/src/tools/account-tools.ts
+++ b/src/tools/account-tools.ts
@@ -198,12 +198,14 @@ export const accountTools = [
                 read_emulation: { type: 'boolean', description: 'Enable read emulation' },
                 spam_save_rate: { type: 'number', description: 'Rate of saving emails from spam' },
                 weekday_only: { type: 'boolean', description: 'Send warmup emails only on weekdays' }
-              }
+              },
+              additionalProperties: false
             },
             warmup_custom_ftag: { type: 'string', description: 'Custom warmup tag' },
             increment: { type: 'string', description: 'Increment setting for warmup ramp-up' },
             reply_rate: { type: 'number', description: 'Target reply rate for warmup emails' }
-          }
+          },
+          additionalProperties: false
         },
 
         // Sending limits and configuration

From b4475b1f85f782d85fe4011c8ffefb5f29284e47 Mon Sep 17 00:00:00 2001
From: Brandon Charleson <170791+bcharleson@users.noreply.github.com>
Date: Thu, 13 Nov 2025 14:17:26 -0800
Subject: [PATCH 03/14] fix: remove invalid additionalProperties: true from all
 nested objects

JSON Schema validation errors were caused by 'additionalProperties: true' which is
not valid in strict validators. Fixed by:

- Removed additionalProperties: true from campaign_schedule object
- Removed additionalProperties: true from campaign_schedule.schedules items
- Removed additionalProperties: true from sequences items
- Removed additionalProperties: true from auto_variant_select object
- Removed additionalProperties: true from all custom_variables objects (3 instances)
- Added additionalProperties: false to reply_to_email body object

When arbitrary properties are needed, omitting additionalProperties entirely is the
correct approach per JSON Schema spec, not setting it to true.

This resolves 'MCP server has validation errors' in Augment and Cursor.
---
 src/tools/campaign-tools.ts | 12 ++++--------
 src/tools/email-tools.ts    |  3 ++-
 src/tools/lead-tools.ts     |  9 +++------
 3 files changed, 9 insertions(+), 15 deletions(-)

diff --git a/src/tools/campaign-tools.ts b/src/tools/campaign-tools.ts
index 536640c..1025963 100644
--- a/src/tools/campaign-tools.ts
+++ b/src/tools/campaign-tools.ts
@@ -202,19 +202,16 @@ export const campaignTools = [
             schedules: {
               type: 'array',
               items: {
-                type: 'object',
-                additionalProperties: true
+                type: 'object'
               }
             }
-          },
-          additionalProperties: true
+          }
         },
         sequences: {
           type: 'array',
           description: 'OPTIONAL: New email sequences to UPDATE the existing sequences. Only provide this if you want to MODIFY the email sequences.',
           items: {
-            type: 'object',
-            additionalProperties: true
+            type: 'object'
           }
         },
         email_gap: {
@@ -269,8 +266,7 @@ export const campaignTools = [
         },
         auto_variant_select: {
           type: 'object',
-          description: 'OPTIONAL: New auto variant selection settings to UPDATE. Only provide this if you want to MODIFY the auto variant selection configuration.',
-          additionalProperties: true
+          description: 'OPTIONAL: New auto variant selection settings to UPDATE. Only provide this if you want to MODIFY the auto variant selection configuration.'
         },
         match_lead_esp: {
           type: 'boolean',
diff --git a/src/tools/email-tools.ts b/src/tools/email-tools.ts
index 7697560..a85e9f3 100644
--- a/src/tools/email-tools.ts
+++ b/src/tools/email-tools.ts
@@ -74,7 +74,8 @@ export const emailTools = [
           properties: {
             html: { type: 'string', description: 'HTML content' },
             text: { type: 'string', description: 'Plain text content' }
-          }
+          },
+          additionalProperties: false
         }
       },
       required: ['reply_to_uuid', 'eaccount', 'subject', 'body'],
diff --git a/src/tools/lead-tools.ts b/src/tools/lead-tools.ts
index 38550d9..4df4b9c 100644
--- a/src/tools/lead-tools.ts
+++ b/src/tools/lead-tools.ts
@@ -106,8 +106,7 @@ export const leadTools = [
         verify_leads_on_import: { type: 'boolean', description: 'Verify email before import (adds 2-5s)', default: false },
         custom_variables: {
           type: 'object',
-          description: '⚠️ Ask user about campaign variables first! Match exact field names. Examples: {"headcount": "50-100", "revenue": "$1M-$5M"}',
-          additionalProperties: true
+          description: '⚠️ Ask user about campaign variables first! Match exact field names. Examples: {"headcount": "50-100", "revenue": "$1M-$5M"}'
         }
       },
       required: [],
@@ -134,8 +133,7 @@ export const leadTools = [
         assigned_to: { type: 'string', description: 'User UUID to assign' },
         custom_variables: {
           type: 'object',
-          description: '⚠️ REPLACES entire object! Include ALL existing + new fields. Get current with get_lead first.',
-          additionalProperties: true
+          description: '⚠️ REPLACES entire object! Include ALL existing + new fields. Get current with get_lead first.'
         }
       },
       required: ['lead_id'],
@@ -231,8 +229,7 @@ export const leadTools = [
               assigned_to: { type: 'string', description: 'User UUID' },
               custom_variables: {
                 type: 'object',
-                description: '⚠️ Align with campaign variables!',
-                additionalProperties: true
+                description: '⚠️ Align with campaign variables!'
               }
             },
             additionalProperties: false

From 70fa23f8ff8511bf7fd8122a3308628cb113e3f3 Mon Sep 17 00:00:00 2001
From: Brandon Charleson <170791+bcharleson@users.noreply.github.com>
Date: Fri, 14 Nov 2025 18:02:29 -0800
Subject: [PATCH 04/14] feat: add TOON format support for token-optimized
 responses

Implements TOON (Token-Oriented Object Notation) encoding for tool responses,
providing 30-60% token reduction for uniform tabular data while maintaining
full MCP protocol compatibility.

Changes:
- Added @toon-format/toon dependency (v1.0.0)
- Created response-formatter utility with automatic TOON/JSON selection
- Implemented TOON encoding for list_accounts (proof of concept)
- Added TOON_IMPLEMENTATION.md documentation

Benefits:
- 30-60% token savings for list operations (accounts, campaigns, leads)
- Better context window efficiency for large datasets
- LLM-friendly structure with explicit array lengths and field headers
- Automatic fallback to JSON for non-uniform data
- No breaking changes to MCP protocol (text content is valid)

Next steps:
- Roll out to list_campaigns, list_leads, list_emails
- Add analytics tools (time-series data is perfect for TOON)
- Monitor token savings in production
---
 package-lock.json               |   7 ++
 package.json                    |  14 ++-
 src/handlers/tool-executor.ts   |  21 ++---
 src/utils/response-formatter.ts | 158 ++++++++++++++++++++++++++++++++
 4 files changed, 179 insertions(+), 21 deletions(-)
 create mode 100644 src/utils/response-formatter.ts

diff --git a/package-lock.json b/package-lock.json
index d05db4b..b331d83 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10,6 +10,7 @@
       "license": "MIT",
       "dependencies": {
         "@modelcontextprotocol/sdk": "^1.15.1",
+        "@toon-format/toon": "^1.0.0",
         "@types/cors": "^2.8.19",
         "@types/express": "^5.0.3",
         "@types/node": "^20.0.0",
@@ -444,6 +445,12 @@
         "zod": "^3.24.1"
       }
     },
+    "node_modules/@toon-format/toon": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/@toon-format/toon/-/toon-1.0.0.tgz",
+      "integrity": "sha512-2gIk8LaqrzpurNDaDWZ72kucAGcBbxJxUnp+4ZP+Pny/QVNdMVf97yzSDTI3ed2q8ypjj8T271P6iE3bRmQBNw==",
+      "license": "MIT"
+    },
     "node_modules/@types/babel__traverse": {
       "version": "7.28.0",
       "resolved": "https://registry.npmjs.org/@types/babel__traverse/-/babel__traverse-7.28.0.tgz",
diff --git a/package.json b/package.json
index 70c33d6..efbec60 100644
--- a/package.json
+++ b/package.json
@@ -46,23 +46,21 @@
   },
   "dependencies": {
     "@modelcontextprotocol/sdk": "^1.15.1",
+    "@toon-format/toon": "^1.0.0",
+    "@types/cors": "^2.8.19",
+    "@types/express": "^5.0.3",
+    "@types/node": "^20.0.0",
     "cors": "^2.8.5",
     "express": "^4.21.2",
     "node-fetch": "^3.3.2",
-    "zod": "^3.25.0",
     "typescript": "^5.3.0",
-    "@types/cors": "^2.8.19",
-    "@types/express": "^5.0.3",
-    "@types/node": "^20.0.0"
+    "zod": "^3.25.0"
   },
   "devDependencies": {
     "@babel/parser": "^7.27.5",
     "@babel/traverse": "^7.27.4",
     "@babel/types": "^7.27.6",
     "@types/babel__traverse": "^7.20.7",
-
-
-
     "tsx": "^4.7.0"
   },
   "engines": {
@@ -72,4 +70,4 @@
     "compatible": true,
     "version": "0.1"
   }
-}
\ No newline at end of file
+}
diff --git a/src/handlers/tool-executor.ts b/src/handlers/tool-executor.ts
index f6115c7..4cf0a4d 100644
--- a/src/handlers/tool-executor.ts
+++ b/src/handlers/tool-executor.ts
@@ -20,6 +20,7 @@ import { ErrorCode, McpError } from '@modelcontextprotocol/sdk/types.js';
 import { makeInstantlyRequest } from '../api/client.js';
 import { ENDPOINTS } from '../api/endpoints.js';
 import { handleLeadTool } from './lead-handler.js';
+import { createMCPResponse } from '../utils/response-formatter.js';
 import {
   getAllAccounts,
   getEligibleSenderAccounts,
@@ -136,19 +137,13 @@ export async function executeToolDirectly(name: string, args: any, apiKey?: stri
         const result = await getAllAccounts(apiKey, paginationParams);
 
         // Return single page with clear pagination metadata
-        return {
-          content: [
-            {
-              type: 'text',
-              text: JSON.stringify({
-                data: result.data,
-                pagination: result.pagination,
-                metadata: result.metadata,
-                success: true
-              }, null, 2)
-            }
-          ]
-        };
+        // Using TOON format for token efficiency (30-60% reduction for tabular data)
+        return createMCPResponse({
+          data: result.data,
+          pagination: result.pagination,
+          metadata: result.metadata,
+          success: true
+        });
       } catch (error: any) {
         console.error('[Instantly MCP] ❌ Error in list_accounts:', error.message);
         throw error;
diff --git a/src/utils/response-formatter.ts b/src/utils/response-formatter.ts
new file mode 100644
index 0000000..59a6d84
--- /dev/null
+++ b/src/utils/response-formatter.ts
@@ -0,0 +1,158 @@
+/**
+ * Response Formatter Utility
+ * 
+ * Converts tool responses to optimal format (TOON or JSON) based on data structure.
+ * TOON provides 30-60% token savings for uniform tabular data while maintaining
+ * full compatibility with MCP protocol (text content is valid).
+ */
+
+import { encode as encodeTOON } from '@toon-format/toon';
+
+/**
+ * Configuration for response formatting
+ */
+export interface FormatOptions {
+  /**
+   * Enable TOON encoding for responses (default: true)
+   * When true, automatically converts uniform arrays to TOON format
+   */
+  enableTOON?: boolean;
+
+  /**
+   * Delimiter for TOON arrays (default: ',')
+   * Options: ',' (comma), '\t' (tab), '|' (pipe)
+   * Tab often provides best token efficiency
+   */
+  delimiter?: ',' | '\t' | '|';
+
+  /**
+   * Minimum array length to use TOON (default: 3)
+   * Smaller arrays may not benefit from TOON overhead
+   */
+  minArrayLength?: number;
+
+  /**
+   * Enable key folding for nested objects (default: false)
+   * Collapses single-key wrapper chains into dotted paths
+   */
+  keyFolding?: 'off' | 'safe';
+}
+
+const DEFAULT_OPTIONS: Required<FormatOptions> = {
+  enableTOON: true,
+  delimiter: '\t', // Tab is most token-efficient
+  minArrayLength: 3,
+  keyFolding: 'off'
+};
+
+/**
+ * Determines if data structure is suitable for TOON encoding
+ * 
+ * TOON excels at:
+ * - Uniform arrays of objects (same fields, primitive values)
+ * - Time-series data
+ * - Tabular data
+ * 
+ * JSON is better for:
+ * - Non-uniform data
+ * - Deeply nested structures
+ * - Small arrays (< 3 items)
+ */
+function shouldUseTOON(data: any, options: Required<FormatOptions>): boolean {
+  if (!options.enableTOON) return false;
+
+  // Check if data contains arrays suitable for TOON
+  if (Array.isArray(data)) {
+    return data.length >= options.minArrayLength && isUniformArray(data);
+  }
+
+  // Check if object contains array properties suitable for TOON
+  if (typeof data === 'object' && data !== null) {
+    return Object.values(data).some(value => 
+      Array.isArray(value) && 
+      value.length >= options.minArrayLength && 
+      isUniformArray(value)
+    );
+  }
+
+  return false;
+}
+
+/**
+ * Checks if array contains uniform objects (same keys, primitive values)
+ */
+function isUniformArray(arr: any[]): boolean {
+  if (arr.length === 0) return false;
+  
+  // Check if all items are objects
+  if (!arr.every(item => typeof item === 'object' && item !== null && !Array.isArray(item))) {
+    return false;
+  }
+
+  // Get keys from first object
+  const firstKeys = Object.keys(arr[0]).sort();
+  
+  // Check if all objects have same keys and primitive values
+  return arr.every(item => {
+    const itemKeys = Object.keys(item).sort();
+    
+    // Same keys?
+    if (itemKeys.length !== firstKeys.length) return false;
+    if (!itemKeys.every((key, i) => key === firstKeys[i])) return false;
+    
+    // All values primitive?
+    return Object.values(item).every(value => {
+      const type = typeof value;
+      return type === 'string' || type === 'number' || type === 'boolean' || value === null;
+    });
+  });
+}
+
+/**
+ * Formats tool response data for optimal token efficiency
+ * 
+ * @param data - Response data to format
+ * @param options - Formatting options
+ * @returns Formatted string (TOON or JSON)
+ */
+export function formatResponse(data: any, options: Partial<FormatOptions> = {}): string {
+  const opts = { ...DEFAULT_OPTIONS, ...options };
+
+  try {
+    // Determine if TOON encoding would be beneficial
+    if (shouldUseTOON(data, opts)) {
+      const toonOutput = encodeTOON(data, {
+        delimiter: opts.delimiter,
+        keyFolding: opts.keyFolding
+      });
+
+      // Add format indicator for LLM
+      return `[TOON Format - Tab-delimited]\n${toonOutput}`;
+    }
+  } catch (error) {
+    // Fallback to JSON if TOON encoding fails
+    console.error('[Response Formatter] TOON encoding failed, falling back to JSON:', error);
+  }
+
+  // Default to pretty-printed JSON
+  return JSON.stringify(data, null, 2);
+}
+
+/**
+ * Creates MCP-compatible content response
+ * 
+ * @param data - Response data
+ * @param options - Formatting options
+ * @returns MCP content array
+ */
+export function createMCPResponse(data: any, options: Partial<FormatOptions> = {}) {
+  return {
+    content: [
+      {
+        type: 'text' as const,
+        text: formatResponse(data, options)
+      }
+    ]
+  };
+}
+

From 1832989806598619dd0f61319b800286300dfabd Mon Sep 17 00:00:00 2001
From: Brandon Charleson <170791+bcharleson@users.noreply.github.com>
Date: Fri, 14 Nov 2025 18:14:58 -0800
Subject: [PATCH 05/14] fix: improve TOON uniformity detection for real-world
 API data

The initial implementation was too strict - required exact same keys in all objects.
Real-world Instantly API data has optional fields (warmup, daily_limit, etc).

Changes:
- Relaxed uniformity check to allow optional fields (50% key overlap threshold)
- Added data normalization (fills missing fields with null before TOON encoding)
- Allow empty objects like warmup: {} (common in Instantly API)
- Fixed TypeScript type error for Object.keys()

This should now properly detect and encode account/campaign/lead arrays as TOON,
even when objects have different optional fields.
---
 src/utils/response-formatter.ts | 93 +++++++++++++++++++++++++++------
 1 file changed, 78 insertions(+), 15 deletions(-)

diff --git a/src/utils/response-formatter.ts b/src/utils/response-formatter.ts
index 59a6d84..5f9ee13 100644
--- a/src/utils/response-formatter.ts
+++ b/src/utils/response-formatter.ts
@@ -80,37 +80,83 @@ function shouldUseTOON(data: any, options: Required<FormatOptions>): boolean {
 
 /**
  * Checks if array contains uniform objects (same keys, primitive values)
+ *
+ * Updated to be more lenient with real-world API data:
+ * - Allows optional fields (not all objects need same keys)
+ * - Requires at least 50% key overlap
+ * - Normalizes data by filling missing fields with null
  */
 function isUniformArray(arr: any[]): boolean {
   if (arr.length === 0) return false;
-  
+
   // Check if all items are objects
   if (!arr.every(item => typeof item === 'object' && item !== null && !Array.isArray(item))) {
     return false;
   }
 
-  // Get keys from first object
-  const firstKeys = Object.keys(arr[0]).sort();
-  
-  // Check if all objects have same keys and primitive values
+  // Collect all unique keys across all objects
+  const allKeys = new Set<string>();
+  arr.forEach(item => {
+    Object.keys(item).forEach(key => allKeys.add(key));
+  });
+
+  const uniqueKeys = Array.from(allKeys);
+
+  // Check if objects have reasonable key overlap (at least 50%)
+  const keyOverlapThreshold = 0.5;
+  const hasGoodOverlap = arr.every(item => {
+    const itemKeys = Object.keys(item);
+    const overlap = itemKeys.filter(key => uniqueKeys.includes(key)).length;
+    return overlap / uniqueKeys.length >= keyOverlapThreshold;
+  });
+
+  if (!hasGoodOverlap) return false;
+
+  // Check if all values are primitives or simple objects
   return arr.every(item => {
-    const itemKeys = Object.keys(item).sort();
-    
-    // Same keys?
-    if (itemKeys.length !== firstKeys.length) return false;
-    if (!itemKeys.every((key, i) => key === firstKeys[i])) return false;
-    
-    // All values primitive?
     return Object.values(item).every(value => {
       const type = typeof value;
-      return type === 'string' || type === 'number' || type === 'boolean' || value === null;
+      // Allow primitives, null, and empty objects (like warmup: {})
+      if (type === 'string' || type === 'number' || type === 'boolean' || value === null) {
+        return true;
+      }
+      // Allow empty objects
+      if (type === 'object' && value !== null && !Array.isArray(value) && Object.keys(value as object).length === 0) {
+        return true;
+      }
+      return false;
+    });
+  });
+}
+
+/**
+ * Normalizes array of objects to have consistent keys
+ * Fills missing fields with null for TOON compatibility
+ */
+function normalizeArray(arr: any[]): any[] {
+  if (arr.length === 0) return arr;
+
+  // Collect all unique keys
+  const allKeys = new Set<string>();
+  arr.forEach(item => {
+    Object.keys(item).forEach(key => allKeys.add(key));
+  });
+
+  const keys = Array.from(allKeys).sort();
+
+  // Normalize each object to have all keys
+  return arr.map(item => {
+    const normalized: any = {};
+    keys.forEach(key => {
+      normalized[key] = item[key] !== undefined ? item[key] : null;
     });
+    return normalized;
   });
 }
 
 /**
  * Formats tool response data for optimal token efficiency
- * 
+ *
  * @param data - Response data to format
  * @param options - Formatting options
  * @returns Formatted string (TOON or JSON)
@@ -121,7 +167,24 @@ export function formatResponse(data: any, options: Partial<FormatOptions> = {}):
   try {
     // Determine if TOON encoding would be beneficial
     if (shouldUseTOON(data, opts)) {
-      const toonOutput = encodeTOON(data, {
+      // Normalize data for TOON encoding
+      let normalizedData = data;
+
+      // If data is an array, normalize it
+      if (Array.isArray(data)) {
+        normalizedData = normalizeArray(data);
+      }
+      // If data is an object with array properties, normalize those arrays
+      else if (typeof data === 'object' && data !== null) {
+        normalizedData = { ...data };
+        Object.keys(normalizedData).forEach(key => {
+          if (Array.isArray(normalizedData[key]) && isUniformArray(normalizedData[key])) {
+            normalizedData[key] = normalizeArray(normalizedData[key]);
+          }
+        });
+      }
+
+      const toonOutput = encodeTOON(normalizedData, {
         delimiter: opts.delimiter,
         keyFolding: opts.keyFolding
       });

From 99c9e184b7335abc43ff7572fea8bd40883d475d Mon Sep 17 00:00:00 2001
From: Brandon Charleson <170791+bcharleson@users.noreply.github.com>
Date: Fri, 14 Nov 2025 18:22:43 -0800
Subject: [PATCH 06/14] fix: detect TOON YAML format and fallback to JSON

TOON library was using YAML-style list format for non-uniform data,
which is actually WORSE for tokens than JSON. Now we detect this and
automatically fall back to JSON.

Detection: Check if TOON output contains '{' and '}:' (tabular format markers).
If not, it used YAML format (starts with '- '), so we use JSON instead.

This ensures we only use TOON when it actually provides token savings.
---
 src/utils/response-formatter.ts | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/utils/response-formatter.ts b/src/utils/response-formatter.ts
index 5f9ee13..364ef5f 100644
--- a/src/utils/response-formatter.ts
+++ b/src/utils/response-formatter.ts
@@ -189,6 +189,16 @@ export function formatResponse(data: any, options: Partial<FormatOptions> = {}):
         keyFolding: opts.keyFolding
       });
 
+      // Check if TOON actually used tabular format (contains "{" for field headers)
+      // If it used YAML-style list format (starts with "- "), it's likely worse than JSON
+      const usedTabularFormat = toonOutput.includes('{') && toonOutput.includes('}:');
+
+      if (!usedTabularFormat) {
+        // TOON chose YAML-style format - fall back to JSON for better token efficiency
+        console.error('[Response Formatter] TOON used YAML format instead of tabular, falling back to JSON');
+        return JSON.stringify(data, null, 2);
+      }
+
       // Add format indicator for LLM
       return `[TOON Format - Tab-delimited]\n${toonOutput}`;
     }

From cb86012fd21749178a5e7e3b53cda05647ae833c Mon Sep 17 00:00:00 2001
From: Brandon Charleson <170791+bcharleson@users.noreply.github.com>
Date: Fri, 14 Nov 2025 18:37:48 -0800
Subject: [PATCH 07/14] feat: roll out TOON to additional list and analytics
 tools

Applied createMCPResponse() to:
- list_campaigns
- get_campaign
- get_campaign_analytics
- get_daily_campaign_analytics
- get_warmup_analytics
- list_emails
- list_leads
- get_lead
- list_lead_lists

All tools tested successfully. Smart fallback working correctly -
returns JSON for non-uniform data, will use TOON for uniform data.

This ensures maximum token efficiency while maintaining compatibility.
---
 src/handlers/lead-handler.ts  |  42 ++++----------
 src/handlers/tool-executor.ts | 106 ++++++++++------------------------
 2 files changed, 43 insertions(+), 105 deletions(-)

diff --git a/src/handlers/lead-handler.ts b/src/handlers/lead-handler.ts
index 1a30b9b..2d8e6ec 100644
--- a/src/handlers/lead-handler.ts
+++ b/src/handlers/lead-handler.ts
@@ -10,6 +10,7 @@
 import { McpError, ErrorCode } from '@modelcontextprotocol/sdk/types.js';
 import { makeInstantlyRequest } from '../api/client.js';
 import { ENDPOINTS } from '../api/endpoints.js';
+import { createMCPResponse } from '../utils/response-formatter.js';
 
 /**
  * Handle all lead-related tool executions
@@ -167,14 +168,7 @@ async function handleListLeads(args: any, apiKey: string) {
       response.client_side_filters_applied = filtersApplied;
     }
 
-    return {
-      content: [
-        {
-          type: 'text',
-          text: JSON.stringify(response, null, 2),
-        },
-      ],
-    };
+    return createMCPResponse(response);
   } catch (error: any) {
     const elapsed = Date.now() - startTime;
     console.error(`[Instantly MCP] ❌ Request failed after ${elapsed}ms: ${error.message}`);
@@ -196,14 +190,7 @@ async function handleGetLead(args: any, apiKey: string) {
 
   const result = await makeInstantlyRequest(`/leads/${args.lead_id}`, {}, apiKey);
 
-  return {
-    content: [
-      {
-        type: 'text',
-        text: JSON.stringify(result, null, 2),
-      },
-    ],
-  };
+  return createMCPResponse(result);
 }
 
 /**
@@ -503,21 +490,14 @@ async function handleListLeadLists(args: any, apiKey: string) {
   const items = listsResult.items || listsResult;
   const nextStartingAfter = listsResult.next_starting_after;
 
-  return {
-    content: [
-      {
-        type: 'text',
-        text: JSON.stringify({
-          success: true,
-          lead_lists: items,
-          next_starting_after: nextStartingAfter,
-          total_returned: Array.isArray(items) ? items.length : 0,
-          has_more: !!nextStartingAfter,
-          message: 'Lead lists retrieved successfully'
-        }, null, 2)
-      }
-    ]
-  };
+  return createMCPResponse({
+    success: true,
+    lead_lists: items,
+    next_starting_after: nextStartingAfter,
+    total_returned: Array.isArray(items) ? items.length : 0,
+    has_more: !!nextStartingAfter,
+    message: 'Lead lists retrieved successfully'
+  });
 }
 
 /**
diff --git a/src/handlers/tool-executor.ts b/src/handlers/tool-executor.ts
index 4cf0a4d..1c5d451 100644
--- a/src/handlers/tool-executor.ts
+++ b/src/handlers/tool-executor.ts
@@ -213,32 +213,25 @@ export async function executeToolDirectly(name: string, args: any, apiKey?: stri
         if (args?.tag_ids) filtersApplied.tag_ids = args.tag_ids;
 
         // Return single page with clear pagination metadata
-        return {
-          content: [
-            {
-              type: 'text',
-              text: JSON.stringify({
-                data: campaignsWithReadableStatus,
-                pagination: {
-                  returned_count: campaignsWithReadableStatus.length,
-                  has_more: hasMore,
-                  next_starting_after: nextCursor,
-                  limit: queryParams.limit,
-                  current_page_note: hasMore
-                    ? `Retrieved ${campaignsWithReadableStatus.length} campaigns. More results available. To get next page, call list_campaigns again with starting_after='${nextCursor}'`
-                    : `Retrieved all available campaigns (${campaignsWithReadableStatus.length} items).`
-                },
-                filters_applied: Object.keys(filtersApplied).length > 0 ? filtersApplied : undefined,
-                metadata: {
-                  request_time_ms: elapsed,
-                  success: true,
-                  status_mapping_note: 'All campaigns include status_label (human-readable) and status_code (numeric) fields'
-                },
-                success: true
-              }, null, 2)
-            }
-          ]
-        };
+        return createMCPResponse({
+          data: campaignsWithReadableStatus,
+          pagination: {
+            returned_count: campaignsWithReadableStatus.length,
+            has_more: hasMore,
+            next_starting_after: nextCursor,
+            limit: queryParams.limit,
+            current_page_note: hasMore
+              ? `Retrieved ${campaignsWithReadableStatus.length} campaigns. More results available. To get next page, call list_campaigns again with starting_after='${nextCursor}'`
+              : `Retrieved all available campaigns (${campaignsWithReadableStatus.length} items).`
+          },
+          filters_applied: Object.keys(filtersApplied).length > 0 ? filtersApplied : undefined,
+          metadata: {
+            request_time_ms: elapsed,
+            success: true,
+            status_mapping_note: 'All campaigns include status_label (human-readable) and status_code (numeric) fields'
+          },
+          success: true
+        });
       } catch (error: any) {
         console.error('[Instantly MCP] ❌ Error in list_campaigns:', error.message);
         throw error;
@@ -252,14 +245,7 @@ export async function executeToolDirectly(name: string, args: any, apiKey?: stri
 
       const result = await makeInstantlyRequest(`/campaigns/${args.campaign_id}`, {}, apiKey);
 
-      return {
-        content: [
-          {
-            type: 'text',
-            text: JSON.stringify(result, null, 2),
-          },
-        ],
-      };
+      return createMCPResponse(result);
     }
 
     case 'get_campaign_analytics': {
@@ -314,14 +300,7 @@ export async function executeToolDirectly(name: string, args: any, apiKey?: stri
           }
         } : result;
 
-        return {
-          content: [
-            {
-              type: 'text',
-              text: JSON.stringify(enhancedResult, null, 2),
-            },
-          ],
-        };
+        return createMCPResponse(enhancedResult);
       } catch (error: any) {
         // Enhanced error handling for campaign analytics with detailed debugging
         console.error(`[Instantly MCP] get_campaign_analytics ERROR:`, error);
@@ -368,18 +347,11 @@ export async function executeToolDirectly(name: string, args: any, apiKey?: stri
 
       const result = await makeInstantlyRequest('/campaigns/analytics/daily', { params }, apiKey);
 
-      return {
-        content: [
-          {
-            type: 'text',
-            text: JSON.stringify({
-              success: true,
-              daily_analytics: result,
-              message: 'Daily campaign analytics retrieved successfully'
-            }, null, 2)
-          }
-        ]
-      };
+      return createMCPResponse({
+        success: true,
+        daily_analytics: result,
+        message: 'Daily campaign analytics retrieved successfully'
+      });
     }
 
     case 'create_campaign': {
@@ -765,14 +737,7 @@ export async function executeToolDirectly(name: string, args: any, apiKey?: stri
         body: requestBody
       }, apiKey);
 
-      return {
-        content: [
-          {
-            type: 'text',
-            text: JSON.stringify(result, null, 2),
-          },
-        ],
-      };
+      return createMCPResponse(result);
     }
 
     case 'verify_email': {
@@ -977,18 +942,11 @@ export async function executeToolDirectly(name: string, args: any, apiKey?: stri
         metadata.note += ' All results retrieved (no more pages available).';
       }
 
-      return {
-        content: [
-          {
-            type: 'text',
-            text: JSON.stringify({
-              ...emailsResult,
-              metadata,
-              success: true
-            }, null, 2)
-          }
-        ]
-      };
+      return createMCPResponse({
+        ...emailsResult,
+        metadata,
+        success: true
+      });
     }
 
     case 'get_email': {

From 5752c39b60b1a173b94830e0bbe549d65171f5d6 Mon Sep 17 00:00:00 2001
From: Brandon Charleson <170791+bcharleson@users.noreply.github.com>
Date: Tue, 18 Nov 2025 16:15:41 -0800
Subject: [PATCH 08/14] fix: Remove invalid additionalProperties from
 create_campaign tool

- Fixed JSON Schema validation error in create_campaign tool definition
- Removed 'additionalProperties: true' which is invalid in strict validators (Augment, Cursor)
- This was preventing create_campaign from appearing in MCP client tool lists
- All 36 tools now validate correctly and load in MCP clients

Issue: create_campaign tool was not appearing in Augment/Cursor
Root cause: Invalid JSON Schema - additionalProperties: true not allowed
Solution: Remove additionalProperties property (defaults to allowing additional properties)

Tested: Tool validation passes, all 36 tools present
---
 src/tools/campaign-tools.ts | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/tools/campaign-tools.ts b/src/tools/campaign-tools.ts
index 1025963..da37c73 100644
--- a/src/tools/campaign-tools.ts
+++ b/src/tools/campaign-tools.ts
@@ -123,8 +123,7 @@ export const campaignTools = [
           description: 'Optional: Custom email bodies for each step (array of strings). Must match sequence_steps count. Use \\n for line breaks. If not provided, follow-ups use auto-generated content. Example: ["Hi {{firstName}},...", "Following up...", "Last attempt..."]'
         }
       },
-      required: ['name', 'subject', 'body'],
-      additionalProperties: true
+      required: ['name', 'subject', 'body']
     }
   },
 

From a1e9f6506e195ec4317eac6f4dafeb5d2cf64965 Mon Sep 17 00:00:00 2001
From: Brandon Charleson <170791+bcharleson@users.noreply.github.com>
Date: Tue, 25 Nov 2025 09:29:34 -0600
Subject: [PATCH 09/14] feat: MCP context window optimization - SDK 1.22.0,
 tool pagination, and description compaction

BREAKING CHANGES:
- Tool count reduced from 36 to 31 (consolidated duplicates)
- get_account_details + get_account_info -> get_account (with backward compat)
- pause/resume/warmup/vitals tools -> manage_account_state (with backward compat)

Optimizations:
- Updated MCP SDK from 1.15.1 to 1.22.0
- Implemented tool pagination (MCP 2025-06-18 spec)
- Compacted all tool descriptions for ~40% token reduction
- Added tool annotations (readOnlyHint, destructiveHint, confirmationRequiredHint)
- Consolidated 5 account state tools into manage_account_state

Backward Compatibility:
- Legacy tool names still work via internal routing
- Old SDK clients will receive all tools (pagination optional)

Files Changed:
- package.json: SDK upgrade
- src/config/tool-pagination.ts: New pagination utility
- src/handlers/mcp-handlers.ts: Pagination support in tools/list
- src/handlers/tool-executor.ts: Consolidated tool handlers
- src/tools/*.ts: Compacted descriptions + annotations
---
 package-lock.json             |   3 +-
 package.json                  |   2 +-
 src/config/tool-pagination.ts | 178 ++++++++++++++++
 src/handlers/mcp-handlers.ts  |  26 ++-
 src/handlers/tool-executor.ts | 185 +++++-----------
 src/tools/account-tools.ts    | 264 ++++++++---------------
 src/tools/analytics-tools.ts  | 107 +++-------
 src/tools/campaign-tools.ts   | 333 ++++++-----------------------
 src/tools/email-tools.ts      |  92 ++++----
 src/tools/index.ts            |  31 +--
 src/tools/lead-tools.ts       | 383 ++++++++++++----------------------
 11 files changed, 629 insertions(+), 975 deletions(-)
 create mode 100644 src/config/tool-pagination.ts

diff --git a/package-lock.json b/package-lock.json
index b331d83..d661bdd 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,7 +9,7 @@
       "version": "1.2.0",
       "license": "MIT",
       "dependencies": {
-        "@modelcontextprotocol/sdk": "^1.15.1",
+        "@modelcontextprotocol/sdk": "^1.22.0",
         "@toon-format/toon": "^1.0.0",
         "@types/cors": "^2.8.19",
         "@types/express": "^5.0.3",
@@ -210,7 +210,6 @@
       "version": "1.22.0",
       "resolved": "https://registry.npmjs.org/@modelcontextprotocol/sdk/-/sdk-1.22.0.tgz",
       "integrity": "sha512-VUpl106XVTCpDmTBil2ehgJZjhyLY2QZikzF8NvTXtLRF1CvO5iEE2UNZdVIUer35vFOwMKYeUGbjJtvPWan3g==",
-      "license": "MIT",
       "dependencies": {
         "ajv": "^8.17.1",
         "ajv-formats": "^3.0.1",
diff --git a/package.json b/package.json
index efbec60..dec5ebf 100644
--- a/package.json
+++ b/package.json
@@ -45,7 +45,7 @@
     "test:timezones": "node scripts/test-timezones.js"
   },
   "dependencies": {
-    "@modelcontextprotocol/sdk": "^1.15.1",
+    "@modelcontextprotocol/sdk": "^1.22.0",
     "@toon-format/toon": "^1.0.0",
     "@types/cors": "^2.8.19",
     "@types/express": "^5.0.3",
diff --git a/src/config/tool-pagination.ts b/src/config/tool-pagination.ts
new file mode 100644
index 0000000..b54d82b
--- /dev/null
+++ b/src/config/tool-pagination.ts
@@ -0,0 +1,178 @@
+/**
+ * Tool Pagination Configuration
+ * 
+ * Implements MCP 2025-06-18 tool pagination support for lazy loading.
+ * This allows clients to load tools incrementally rather than all at once,
+ * significantly reducing initial context window overhead.
+ * 
+ * Per MCP spec:
+ * - tools/list supports cursor-based pagination
+ * - Servers can return tools in chunks with nextCursor
+ * - Clients use cursor parameter to fetch next page
+ */
+
+export interface ToolPaginationConfig {
+  /**
+   * Number of tools to return per page
+   * Default: 10 (optimized for context window efficiency)
+   * Set to 0 or Infinity to disable pagination (return all tools)
+   */
+  pageSize: number;
+
+  /**
+   * Enable pagination (default: true for context efficiency)
+   * Set to false for backward compatibility with older clients
+   */
+  enabled: boolean;
+}
+
+/**
+ * Default pagination configuration
+ * 
+ * Returns 10 tools per page by default for optimal context window usage.
+ * Clients that don't support pagination will still work but get all tools.
+ */
+export const DEFAULT_TOOL_PAGINATION: ToolPaginationConfig = {
+  pageSize: 10,
+  enabled: true
+};
+
+/**
+ * Environment-based pagination config
+ * 
+ * Can be overridden via environment variables:
+ * - TOOL_PAGINATION_ENABLED: 'true' or 'false'
+ * - TOOL_PAGINATION_PAGE_SIZE: number of tools per page
+ */
+export function getToolPaginationConfig(): ToolPaginationConfig {
+  const envEnabled = process.env.TOOL_PAGINATION_ENABLED;
+  const envPageSize = process.env.TOOL_PAGINATION_PAGE_SIZE;
+
+  return {
+    enabled: envEnabled !== undefined ? envEnabled === 'true' : DEFAULT_TOOL_PAGINATION.enabled,
+    pageSize: envPageSize ? parseInt(envPageSize, 10) : DEFAULT_TOOL_PAGINATION.pageSize
+  };
+}
+
+/**
+ * Pagination cursor utilities
+ */
+export class ToolPaginationCursor {
+  /**
+   * Encode pagination state to cursor string
+   */
+  static encode(startIndex: number): string {
+    return Buffer.from(JSON.stringify({ s: startIndex })).toString('base64url');
+  }
+
+  /**
+   * Decode cursor string to pagination state
+   */
+  static decode(cursor: string): { startIndex: number } | null {
+    try {
+      const decoded = JSON.parse(Buffer.from(cursor, 'base64url').toString('utf-8'));
+      if (typeof decoded.s === 'number') {
+        return { startIndex: decoded.s };
+      }
+      return null;
+    } catch {
+      return null;
+    }
+  }
+}
+
+/**
+ * Paginate tools array
+ * 
+ * @param tools - Full array of tool definitions
+ * @param cursor - Optional cursor from previous request
+ * @param config - Pagination configuration
+ * @returns Paginated result with tools and nextCursor
+ */
+export function paginateTools<T>(
+  tools: T[],
+  cursor?: string,
+  config: ToolPaginationConfig = getToolPaginationConfig()
+): { tools: T[]; nextCursor?: string } {
+  // If pagination disabled, return all tools
+  if (!config.enabled || config.pageSize <= 0 || config.pageSize >= tools.length) {
+    return { tools };
+  }
+
+  // Decode cursor to get start index
+  let startIndex = 0;
+  if (cursor) {
+    const decoded = ToolPaginationCursor.decode(cursor);
+    if (decoded) {
+      startIndex = decoded.startIndex;
+    }
+  }
+
+  // Validate start index
+  if (startIndex < 0 || startIndex >= tools.length) {
+    startIndex = 0;
+  }
+
+  // Calculate end index
+  const endIndex = Math.min(startIndex + config.pageSize, tools.length);
+  const pageTools = tools.slice(startIndex, endIndex);
+
+  // Generate next cursor if more tools available
+  const hasMore = endIndex < tools.length;
+  const nextCursor = hasMore ? ToolPaginationCursor.encode(endIndex) : undefined;
+
+  return {
+    tools: pageTools,
+    nextCursor
+  };
+}
+
+/**
+ * Get pagination metadata for logging/debugging
+ */
+export function getPaginationInfo(
+  totalTools: number,
+  cursor?: string,
+  config: ToolPaginationConfig = getToolPaginationConfig()
+): {
+  totalTools: number;
+  pageSize: number;
+  currentPage: number;
+  totalPages: number;
+  startIndex: number;
+  endIndex: number;
+} {
+  if (!config.enabled || config.pageSize <= 0) {
+    return {
+      totalTools,
+      pageSize: totalTools,
+      currentPage: 1,
+      totalPages: 1,
+      startIndex: 0,
+      endIndex: totalTools
+    };
+  }
+
+  let startIndex = 0;
+  if (cursor) {
+    const decoded = ToolPaginationCursor.decode(cursor);
+    if (decoded) {
+      startIndex = decoded.startIndex;
+    }
+  }
+
+  const pageSize = config.pageSize;
+  const totalPages = Math.ceil(totalTools / pageSize);
+  const currentPage = Math.floor(startIndex / pageSize) + 1;
+  const endIndex = Math.min(startIndex + pageSize, totalTools);
+
+  return {
+    totalTools,
+    pageSize,
+    currentPage,
+    totalPages,
+    startIndex,
+    endIndex
+  };
+}
+
diff --git a/src/handlers/mcp-handlers.ts b/src/handlers/mcp-handlers.ts
index c693122..b288691 100644
--- a/src/handlers/mcp-handlers.ts
+++ b/src/handlers/mcp-handlers.ts
@@ -22,6 +22,7 @@ import {
 import { TOOLS_DEFINITION } from '../tools/index.js';
 import { executeToolDirectly } from './tool-executor.js';
 import { handleInstantlyError } from '../error-handler.js';
+import { paginateTools, getPaginationInfo, getToolPaginationConfig } from '../config/tool-pagination.js';
 
 /**
  * Load Instantly.ai icons for MCP protocol
@@ -103,12 +104,29 @@ export function registerMcpHandlers(server: Server, apiKey?: string): void {
     return initResponse;
   });
 
-  // List tools handler
-  server.setRequestHandler(ListToolsRequestSchema, async () => {
-    console.error('[Instantly MCP] 📋 Listing available tools...');
+  // List tools handler with pagination support (MCP 2025-06-18)
+  server.setRequestHandler(ListToolsRequestSchema, async (request) => {
+    const cursor = request.params?.cursor;
+    const config = getToolPaginationConfig();
+    
+    // Get pagination info for logging
+    const paginationInfo = getPaginationInfo(TOOLS_DEFINITION.length, cursor, config);
+    
+    console.error(`[Instantly MCP] 📋 Listing tools (page ${paginationInfo.currentPage}/${paginationInfo.totalPages}, ` +
+      `showing ${paginationInfo.startIndex + 1}-${paginationInfo.endIndex} of ${paginationInfo.totalTools})...`);
+    
+    // Paginate tools for context window efficiency
+    const { tools, nextCursor } = paginateTools(TOOLS_DEFINITION, cursor, config);
+    
+    if (nextCursor) {
+      console.error(`[Instantly MCP] 📄 More tools available - nextCursor provided for lazy loading`);
+    } else {
+      console.error(`[Instantly MCP] ✅ All tools returned (pagination ${config.enabled ? 'enabled' : 'disabled'})`);
+    }
 
     return {
-      tools: TOOLS_DEFINITION
+      tools,
+      ...(nextCursor && { nextCursor })
     };
   });
 
diff --git a/src/handlers/tool-executor.ts b/src/handlers/tool-executor.ts
index 1c5d451..533cfd6 100644
--- a/src/handlers/tool-executor.ts
+++ b/src/handlers/tool-executor.ts
@@ -1040,14 +1040,16 @@ export async function executeToolDirectly(name: string, args: any, apiKey?: stri
       };
     }
 
-    case 'get_account_details': {
-      console.error('[Instantly MCP] 👤 Executing get_account_details...');
+    // Consolidated: get_account (replaces get_account_details and get_account_info)
+    case 'get_account':
+    case 'get_account_details':  // Backward compatibility
+    case 'get_account_info': {   // Backward compatibility
+      console.error(`[Instantly MCP] 👤 Executing get_account (called as: ${name})...`);
 
       if (!args.email) {
-        throw new McpError(ErrorCode.InvalidParams, 'Email parameter is required for get_account_details');
+        throw new McpError(ErrorCode.InvalidParams, 'Email parameter is required');
       }
 
-      // This is essentially the same as get_account_info - might be a duplicate
       const accountResult = await makeInstantlyRequest(`/accounts/${args.email}`, {}, apiKey);
 
       return {
@@ -1056,23 +1058,52 @@ export async function executeToolDirectly(name: string, args: any, apiKey?: stri
             type: 'text',
             text: JSON.stringify({
               success: true,
-              account_details: accountResult,
-              message: 'Account details retrieved successfully',
-              note: 'This tool provides the same information as get_account_info'
+              account: accountResult,
+              message: 'Account details retrieved successfully'
             }, null, 2)
           }
         ]
       };
     }
 
-    case 'get_account_info': {
-      console.error('[Instantly MCP] 👤 Executing get_account_info...');
+    // Consolidated: manage_account_state (replaces pause/resume/warmup/vitals tools)
+    case 'manage_account_state': {
+      console.error('[Instantly MCP] 🔧 Executing manage_account_state...');
 
       if (!args.email) {
-        throw new McpError(ErrorCode.InvalidParams, 'Email parameter is required for get_account_info');
+        throw new McpError(ErrorCode.InvalidParams, 'Email is required');
+      }
+      if (!args.action) {
+        throw new McpError(ErrorCode.InvalidParams, 'Action is required (pause, resume, enable_warmup, disable_warmup, test_vitals)');
       }
 
-      const accountInfoResult = await makeInstantlyRequest(`/accounts/${args.email}`, {}, apiKey);
+      let result: any;
+      let message: string;
+
+      switch (args.action) {
+        case 'pause':
+          result = await makeInstantlyRequest(`/accounts/${args.email}/pause`, { method: 'POST' }, apiKey);
+          message = `Account ${args.email} paused successfully`;
+          break;
+        case 'resume':
+          result = await makeInstantlyRequest(`/accounts/${args.email}/resume`, { method: 'POST' }, apiKey);
+          message = `Account ${args.email} resumed successfully`;
+          break;
+        case 'enable_warmup':
+          result = await makeInstantlyRequest('/accounts/warmup/enable', { method: 'POST', body: { emails: [args.email] } }, apiKey);
+          message = `Warmup enabled for ${args.email}`;
+          break;
+        case 'disable_warmup':
+          result = await makeInstantlyRequest('/accounts/warmup/disable', { method: 'POST', body: { emails: [args.email] } }, apiKey);
+          message = `Warmup disabled for ${args.email}`;
+          break;
+        case 'test_vitals':
+          result = await makeInstantlyRequest('/accounts/test/vitals', { method: 'POST', body: { accounts: [args.email] } }, apiKey);
+          message = `Account vitals tested for ${args.email}`;
+          break;
+        default:
+          throw new McpError(ErrorCode.InvalidParams, `Unknown action: ${args.action}. Valid: pause, resume, enable_warmup, disable_warmup, test_vitals`);
+      }
 
       return {
         content: [
@@ -1080,60 +1111,24 @@ export async function executeToolDirectly(name: string, args: any, apiKey?: stri
             type: 'text',
             text: JSON.stringify({
               success: true,
-              account: accountInfoResult,
-              message: 'Account information retrieved successfully'
+              action: args.action,
+              result,
+              message
             }, null, 2)
           }
         ]
       };
     }
 
+    // Backward compatibility: route old tool names to manage_account_state
     case 'pause_account': {
-      console.error('[Instantly MCP] ⏸️ Executing pause_account...');
-
-      if (!args.email) {
-        throw new McpError(ErrorCode.InvalidParams, 'Email is required for pause_account');
-      }
-
-      console.error(`[Instantly MCP] 🔧 Using endpoint: /accounts/${args.email}/pause`);
-      const pauseAccountResult = await makeInstantlyRequest(`/accounts/${args.email}/pause`, { method: 'POST' }, apiKey);
-
-      return {
-        content: [
-          {
-            type: 'text',
-            text: JSON.stringify({
-              success: true,
-              account: pauseAccountResult,
-              message: `Account ${args.email} paused successfully`
-            }, null, 2)
-          }
-        ]
-      };
+      console.error('[Instantly MCP] ⏸️ pause_account (legacy) -> manage_account_state');
+      return executeToolDirectly('manage_account_state', { email: args.email, action: 'pause' }, apiKey);
     }
 
     case 'resume_account': {
-      console.error('[Instantly MCP] ▶️ Executing resume_account...');
-
-      if (!args.email) {
-        throw new McpError(ErrorCode.InvalidParams, 'Email is required for resume_account');
-      }
-
-      console.error(`[Instantly MCP] 🔧 Using endpoint: /accounts/${args.email}/resume`);
-      const resumeAccountResult = await makeInstantlyRequest(`/accounts/${args.email}/resume`, { method: 'POST' }, apiKey);
-
-      return {
-        content: [
-          {
-            type: 'text',
-            text: JSON.stringify({
-              success: true,
-              account: resumeAccountResult,
-              message: `Account ${args.email} resumed successfully`
-            }, null, 2)
-          }
-        ]
-      };
+      console.error('[Instantly MCP] ▶️ resume_account (legacy) -> manage_account_state');
+      return executeToolDirectly('manage_account_state', { email: args.email, action: 'resume' }, apiKey);
     }
 
     case 'create_account': {
@@ -1213,86 +1208,20 @@ export async function executeToolDirectly(name: string, args: any, apiKey?: stri
       };
     }
 
+    // Backward compatibility: route legacy warmup/vitals tools to manage_account_state
     case 'enable_warmup': {
-      console.error('[Instantly MCP] 🔥 Executing enable_warmup...');
-
-      if (!args.email) {
-        throw new McpError(ErrorCode.InvalidParams, 'Email is required for enable_warmup');
-      }
-
-      console.error(`[Instantly MCP] 🔧 Using endpoint: /accounts/warmup/enable`);
-      const enableWarmupResult = await makeInstantlyRequest('/accounts/warmup/enable', {
-        method: 'POST',
-        body: { emails: [args.email] }
-      }, apiKey);
-
-      return {
-        content: [
-          {
-            type: 'text',
-            text: JSON.stringify({
-              success: true,
-              result: enableWarmupResult,
-              message: `Warmup enabled for account ${args.email}`
-            }, null, 2)
-          }
-        ]
-      };
+      console.error('[Instantly MCP] 🔥 enable_warmup (legacy) -> manage_account_state');
+      return executeToolDirectly('manage_account_state', { email: args.email, action: 'enable_warmup' }, apiKey);
     }
 
     case 'disable_warmup': {
-      console.error('[Instantly MCP] ❄️ Executing disable_warmup...');
-
-      if (!args.email) {
-        throw new McpError(ErrorCode.InvalidParams, 'Email is required for disable_warmup');
-      }
-
-      console.error(`[Instantly MCP] 🔧 Using endpoint: /accounts/warmup/disable`);
-      const disableWarmupResult = await makeInstantlyRequest('/accounts/warmup/disable', {
-        method: 'POST',
-        body: { emails: [args.email] }
-      }, apiKey);
-
-      return {
-        content: [
-          {
-            type: 'text',
-            text: JSON.stringify({
-              success: true,
-              result: disableWarmupResult,
-              message: `Warmup disabled for account ${args.email}`
-            }, null, 2)
-          }
-        ]
-      };
+      console.error('[Instantly MCP] ❄️ disable_warmup (legacy) -> manage_account_state');
+      return executeToolDirectly('manage_account_state', { email: args.email, action: 'disable_warmup' }, apiKey);
     }
 
     case 'test_account_vitals': {
-      console.error('[Instantly MCP] 🩺 Executing test_account_vitals...');
-
-      if (!args.email) {
-        throw new McpError(ErrorCode.InvalidParams, 'Email is required for test_account_vitals');
-      }
-
-      console.error(`[Instantly MCP] 🔧 Using endpoint: /accounts/test/vitals`);
-      const testVitalsResult = await makeInstantlyRequest('/accounts/test/vitals', {
-        method: 'POST',
-        body: { accounts: [args.email] }
-      }, apiKey);
-
-      return {
-        content: [
-          {
-            type: 'text',
-            text: JSON.stringify({
-              success: true,
-              vitals: testVitalsResult,
-              message: `Account vitals tested for ${args.email}`,
-              note: 'This diagnostic tool helps identify account connectivity and health issues'
-            }, null, 2)
-          }
-        ]
-      };
+      console.error('[Instantly MCP] 🩺 test_account_vitals (legacy) -> manage_account_state');
+      return executeToolDirectly('manage_account_state', { email: args.email, action: 'test_vitals' }, apiKey);
     }
 
     default:
diff --git a/src/tools/account-tools.ts b/src/tools/account-tools.ts
index b6af946..8290c8d 100644
--- a/src/tools/account-tools.ts
+++ b/src/tools/account-tools.ts
@@ -1,243 +1,143 @@
 /**
- * Instantly MCP Server - Account Tools
+ * Instantly MCP Server - Account Tools (Compacted)
  * 
  * Tool definitions for account management operations.
- * Total: 11 account tools
+ * Optimized for minimal context window overhead.
+ * Total: 10 account tools (consolidated get_account_details + get_account_info)
  */
 
 export const accountTools = [
   {
     name: 'list_accounts',
-    title: 'List Email Accounts',
-    description: 'List email accounts with pagination. Filter by domain, status, provider, or tags. Use exact cursor from next_starting_after for pagination.',
+    title: 'List Accounts',
+    description: 'List email accounts with pagination. Filter by status, provider, or tags.',
+    annotations: { readOnlyHint: true },
     inputSchema: {
       type: 'object',
       properties: {
-        limit: {
-          type: 'number',
-          description: 'Number of items per page (1-100, default: 100)',
-          minimum: 1,
-          maximum: 100
-        },
-        starting_after: {
-          type: 'string',
-          description: 'Pagination cursor from previous response. CRITICAL: Use the EXACT value from response.pagination.next_starting_after field (NOT an email address or ID from the data). Example: If previous response had "next_starting_after": "abc123xyz", use starting_after="abc123xyz". Omit for first page.'
-        },
-        search: {
-          type: 'string',
-          description: 'Search accounts by email domain (e.g., "gmail.com", "company.com"). Filters accounts whose email addresses contain this string.'
-        },
-        status: {
-          type: 'number',
-          description: 'Filter by account status. Values: 1=Active, 2=Paused, -1=Connection Error, -2=Soft Bounce Error, -3=Sending Error',
-          enum: [1, 2, -1, -2, -3]
-        },
-        provider_code: {
-          type: 'number',
-          description: 'Filter by ESP provider. Values: 1=Custom IMAP/SMTP, 2=Google, 3=Microsoft, 4=AWS',
-          enum: [1, 2, 3, 4]
-        },
-        tag_ids: {
-          type: 'string',
-          description: 'Filter by tag IDs (comma-separated). Example: "tag1,tag2,tag3"'
-        }
-      },
-      additionalProperties: false
+        limit: { type: 'number', description: '1-100, default: 100' },
+        starting_after: { type: 'string', description: 'Cursor from pagination.next_starting_after' },
+        search: { type: 'string', description: 'Search by email domain' },
+        status: { type: 'number', description: '1=Active, 2=Paused, -1/-2/-3=Errors', enum: [1, 2, -1, -2, -3] },
+        provider_code: { type: 'number', description: '1=IMAP, 2=Google, 3=Microsoft, 4=AWS', enum: [1, 2, 3, 4] },
+        tag_ids: { type: 'string', description: 'Comma-separated tag IDs' }
+      }
     }
   },
 
   {
-    name: 'get_account_details',
-    title: 'Get Account Details',
-    description: 'Get account details including warmup status and campaign eligibility',
+    name: 'get_account',
+    title: 'Get Account',
+    description: 'Get account details, warmup status, and campaign eligibility by email',
+    annotations: { readOnlyHint: true },
     inputSchema: {
       type: 'object',
       properties: {
         email: { type: 'string', description: 'Account email address' }
       },
-      required: ['email'],
-      additionalProperties: false
-    }
-  },
-
-  {
-    name: 'get_account_info',
-    title: 'Get Account Info',
-    description: 'Get account information and status (read-only)',
-    inputSchema: {
-      type: 'object',
-      properties: {
-        email: { type: 'string', description: 'Account email address' }
-      },
-      required: ['email'],
-      additionalProperties: false
+      required: ['email']
     }
   },
 
   {
     name: 'create_account',
-    title: 'Create Email Account',
-    description: 'Create email account with IMAP/SMTP configuration. Requires email, name, provider_code, and IMAP/SMTP credentials.',
-    inputSchema: {
-      type: 'object',
-      properties: {
-        email: { type: 'string', description: 'Email address' },
-        first_name: { type: 'string', description: 'First name' },
-        last_name: { type: 'string', description: 'Last name' },
-        provider_code: { type: 'number', description: 'Email provider code' },
-        imap_username: { type: 'string', description: 'IMAP username' },
-        imap_password: { type: 'string', description: 'IMAP password' },
-        imap_host: { type: 'string', description: 'IMAP host (e.g., imap.gmail.com)' },
-        imap_port: { type: 'number', description: 'IMAP port (e.g., 993)' },
-        smtp_username: { type: 'string', description: 'SMTP username' },
-        smtp_password: { type: 'string', description: 'SMTP password' },
-        smtp_host: { type: 'string', description: 'SMTP host (e.g., smtp.gmail.com)' },
-        smtp_port: { type: 'number', description: 'SMTP port (e.g., 587)' }
-      },
-      required: ['email', 'first_name', 'last_name', 'provider_code', 'imap_username', 'imap_password', 'imap_host', 'imap_port', 'smtp_username', 'smtp_password', 'smtp_host', 'smtp_port'],
-      additionalProperties: false
-    }
-  },
-
-  {
-    name: 'pause_account',
-    title: 'Pause Account',
-    description: 'Pause sending account',
-    inputSchema: {
-      type: 'object',
-      properties: {
-        email: { type: 'string', description: 'Account email' }
-      },
-      required: ['email'],
-      additionalProperties: false
-    }
-  },
-
-  {
-    name: 'resume_account',
-    title: 'Resume Account',
-    description: 'Resume paused sending account',
-    inputSchema: {
-      type: 'object',
-      properties: {
-        email: { type: 'string', description: 'Account email' }
-      },
-      required: ['email'],
-      additionalProperties: false
-    }
-  },
-
-  {
-    name: 'enable_warmup',
-    title: 'Enable Warmup',
-    description: 'Enable email warmup to improve deliverability',
-    inputSchema: {
-      type: 'object',
-      properties: {
-        email: { type: 'string', description: 'Account email' }
-      },
-      required: ['email'],
-      additionalProperties: false
-    }
-  },
-
-  {
-    name: 'disable_warmup',
-    title: 'Disable Warmup',
-    description: 'Disable email warmup',
-    inputSchema: {
-      type: 'object',
-      properties: {
-        email: { type: 'string', description: 'Account email' }
-      },
-      required: ['email'],
-      additionalProperties: false
-    }
-  },
-
-  {
-    name: 'test_account_vitals',
-    title: 'Test Account Vitals',
-    description: 'Test account connectivity and health',
+    title: 'Create Account',
+    description: 'Create email account with IMAP/SMTP credentials',
+    annotations: { destructiveHint: false },
     inputSchema: {
       type: 'object',
       properties: {
-        email: { type: 'string', description: 'Account email' }
+        email: { type: 'string' },
+        first_name: { type: 'string' },
+        last_name: { type: 'string' },
+        provider_code: { type: 'number', description: '1=IMAP, 2=Google, 3=Microsoft, 4=AWS' },
+        imap_username: { type: 'string' },
+        imap_password: { type: 'string' },
+        imap_host: { type: 'string', description: 'e.g., imap.gmail.com' },
+        imap_port: { type: 'number', description: 'e.g., 993' },
+        smtp_username: { type: 'string' },
+        smtp_password: { type: 'string' },
+        smtp_host: { type: 'string', description: 'e.g., smtp.gmail.com' },
+        smtp_port: { type: 'number', description: 'e.g., 587' }
       },
-      required: ['email'],
-      additionalProperties: false
+      required: ['email', 'first_name', 'last_name', 'provider_code', 'imap_username', 'imap_password', 'imap_host', 'imap_port', 'smtp_username', 'smtp_password', 'smtp_host', 'smtp_port']
     }
   },
 
   {
     name: 'update_account',
     title: 'Update Account',
-    description: 'Update account settings (partial updates). Supports name, warmup config, daily_limit, sending_gap, tracking_domain.',
+    description: 'Update account settings (partial). Supports name, warmup, daily_limit, sending_gap, tracking_domain.',
+    annotations: { destructiveHint: false },
     inputSchema: {
       type: 'object',
       properties: {
-        email: { type: 'string', description: 'Email address of the account to update (required)' },
-
-        // Basic account information
-        first_name: { type: 'string', description: 'First name associated with the account' },
-        last_name: { type: 'string', description: 'Last name associated with the account' },
-
-        // Warmup configuration
+        email: { type: 'string', description: 'Account to update' },
+        first_name: { type: 'string' },
+        last_name: { type: 'string' },
         warmup: {
           type: 'object',
-          description: 'Warmup configuration for the account',
           properties: {
-            limit: { type: 'number', description: 'Warmup limit (number of warmup emails per day)' },
+            limit: { type: 'number' },
             advanced: {
               type: 'object',
-              description: 'Advanced warmup settings',
               properties: {
-                warm_ctd: { type: 'boolean', description: 'Warm click-to-deliver' },
-                open_rate: { type: 'number', description: 'Target open rate for warmup emails' },
-                important_rate: { type: 'number', description: 'Rate of marking emails as important' },
-                read_emulation: { type: 'boolean', description: 'Enable read emulation' },
-                spam_save_rate: { type: 'number', description: 'Rate of saving emails from spam' },
-                weekday_only: { type: 'boolean', description: 'Send warmup emails only on weekdays' }
-              },
-              additionalProperties: false
+                warm_ctd: { type: 'boolean' },
+                open_rate: { type: 'number' },
+                important_rate: { type: 'number' },
+                read_emulation: { type: 'boolean' },
+                spam_save_rate: { type: 'number' },
+                weekday_only: { type: 'boolean' }
+              }
             },
-            warmup_custom_ftag: { type: 'string', description: 'Custom warmup tag' },
-            increment: { type: 'string', description: 'Increment setting for warmup ramp-up' },
-            reply_rate: { type: 'number', description: 'Target reply rate for warmup emails' }
-          },
-          additionalProperties: false
+            warmup_custom_ftag: { type: 'string' },
+            increment: { type: 'string' },
+            reply_rate: { type: 'number' }
+          }
         },
+        daily_limit: { type: 'number' },
+        sending_gap: { type: 'number', description: 'Minutes between emails (0-1440)' },
+        enable_slow_ramp: { type: 'boolean' },
+        tracking_domain_name: { type: 'string' },
+        tracking_domain_status: { type: 'string' },
+        skip_cname_check: { type: 'boolean' },
+        remove_tracking_domain: { type: 'boolean' },
+        inbox_placement_test_limit: { type: 'number' }
+      },
+      required: ['email']
+    }
+  },
 
-        // Sending limits and configuration
-        daily_limit: { type: 'number', description: 'Daily email sending limit per account' },
-        sending_gap: { type: 'number', description: 'Gap between emails sent from this account in minutes (0-1440, minimum wait time when used with multiple campaigns)' },
-        enable_slow_ramp: { type: 'boolean', description: 'Enable slow ramp up for sending limits' },
-
-        // Tracking domain configuration
-        tracking_domain_name: { type: 'string', description: 'Tracking domain name' },
-        tracking_domain_status: { type: 'string', description: 'Tracking domain status' },
-        skip_cname_check: { type: 'boolean', description: 'Skip CNAME check for tracking domain' },
-        remove_tracking_domain: { type: 'boolean', description: 'Remove tracking domain from account' },
-
-        // Inbox placement testing
-        inbox_placement_test_limit: { type: 'number', description: 'Limit for inbox placement tests' }
+  {
+    name: 'manage_account_state',
+    title: 'Manage Account State',
+    description: 'Pause, resume, enable/disable warmup, or test account vitals',
+    annotations: { destructiveHint: false },
+    inputSchema: {
+      type: 'object',
+      properties: {
+        email: { type: 'string', description: 'Account email' },
+        action: { 
+          type: 'string', 
+          description: 'Action to perform',
+          enum: ['pause', 'resume', 'enable_warmup', 'disable_warmup', 'test_vitals']
+        }
       },
-      required: ['email'],
-      additionalProperties: false
+      required: ['email', 'action']
     }
   },
 
   {
     name: 'delete_account',
     title: 'Delete Account',
-    description: '🚨 DESTRUCTIVE: Permanently delete email account. ⚠️ CANNOT BE UNDONE! All data lost forever. Use with extreme caution!',
+    description: '🚨 PERMANENTLY delete account. CANNOT UNDO. All data lost forever!',
+    annotations: { destructiveHint: true, confirmationRequiredHint: true },
     inputSchema: {
       type: 'object',
       properties: {
-        email: { type: 'string', description: '⚠️ Email to DELETE PERMANENTLY' }
+        email: { type: 'string', description: 'Email to DELETE PERMANENTLY' }
       },
-      required: ['email'],
-      additionalProperties: false
+      required: ['email']
     }
   },
 ];
diff --git a/src/tools/analytics-tools.ts b/src/tools/analytics-tools.ts
index 9223706..ac265c5 100644
--- a/src/tools/analytics-tools.ts
+++ b/src/tools/analytics-tools.ts
@@ -1,109 +1,58 @@
 /**
- * Instantly MCP Server - Analytics Tools
+ * Instantly MCP Server - Analytics Tools (Compacted)
  * 
- * Tool definitions for analytics and reporting operations.
+ * Tool definitions for analytics and reporting.
+ * Optimized for minimal context window overhead.
  * Total: 3 analytics tools
  */
 
 export const analyticsTools = [
   {
     name: 'get_campaign_analytics',
-    title: 'Get Campaign Analytics',
-    description: 'Get campaign performance metrics (opens, clicks, replies, bounces). Filter by campaign ID(s) and date range.',
+    title: 'Campaign Analytics',
+    description: 'Get campaign metrics: opens, clicks, replies, bounces. Filter by campaign(s) and dates.',
+    annotations: { readOnlyHint: true },
     inputSchema: {
       type: 'object',
       properties: {
-        campaign_id: {
-          type: 'string',
-          description: 'Single campaign ID (optional, omit for all campaigns)'
-        },
-        campaign_ids: {
-          type: 'array',
-          items: { type: 'string' },
-          description: 'Multiple campaign IDs (optional, use instead of campaign_id)'
-        },
-        start_date: {
-          type: 'string',
-          description: 'Start date (YYYY-MM-DD, optional)',
-          pattern: '^\\d{4}-\\d{2}-\\d{2}$'
-        },
-        end_date: {
-          type: 'string',
-          description: 'End date (YYYY-MM-DD, optional)',
-          pattern: '^\\d{4}-\\d{2}-\\d{2}$'
-        },
-        exclude_total_leads_count: {
-          type: 'boolean',
-          description: 'Exclude leads count for faster response (optional)'
-        }
-      },
-      required: [],
-      additionalProperties: false
+        campaign_id: { type: 'string', description: 'Single campaign UUID (omit for all)' },
+        campaign_ids: { type: 'array', items: { type: 'string' }, description: 'Multiple campaign UUIDs' },
+        start_date: { type: 'string', description: 'YYYY-MM-DD' },
+        end_date: { type: 'string', description: 'YYYY-MM-DD' },
+        exclude_total_leads_count: { type: 'boolean', description: 'Faster response' }
+      }
     }
   },
 
   {
     name: 'get_daily_campaign_analytics',
-    title: 'Get Daily Campaign Analytics',
-    description: 'Get day-by-day campaign performance analytics with date filtering',
+    title: 'Daily Analytics',
+    description: 'Day-by-day campaign performance analytics',
+    annotations: { readOnlyHint: true },
     inputSchema: {
       type: 'object',
       properties: {
-        campaign_id: {
-          type: 'string',
-          description: 'Campaign ID (optional, omit for all)',
-          pattern: '^[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}$'
-        },
-        start_date: {
-          type: 'string',
-          description: 'Start date (YYYY-MM-DD)',
-          pattern: '^\\d{4}-\\d{2}-\\d{2}$'
-        },
-        end_date: {
-          type: 'string',
-          description: 'End date (YYYY-MM-DD)',
-          pattern: '^\\d{4}-\\d{2}-\\d{2}$'
-        },
-        campaign_status: {
-          type: 'number',
-          description: 'Campaign status filter: 0=Draft, 1=Active, 2=Paused, 3=Completed, 4=Running Subsequences',
-          enum: [0, 1, 2, 3, 4, -99, -1, -2]
-        }
-      },
-      required: [],
-      additionalProperties: false
+        campaign_id: { type: 'string', description: 'Campaign UUID (omit for all)' },
+        start_date: { type: 'string', description: 'YYYY-MM-DD' },
+        end_date: { type: 'string', description: 'YYYY-MM-DD' },
+        campaign_status: { type: 'number', description: '0=Draft, 1=Active, 2=Paused, 3=Completed', enum: [0, 1, 2, 3, 4, -99, -1, -2] }
+      }
     }
   },
 
   {
     name: 'get_warmup_analytics',
-    title: 'Get Warmup Analytics',
-    description: 'Get email warmup analytics for one or more accounts',
+    title: 'Warmup Analytics',
+    description: 'Get warmup metrics for account(s)',
+    annotations: { readOnlyHint: true },
     inputSchema: {
       type: 'object',
       properties: {
-        emails: {
-          type: 'array',
-          items: { type: 'string' },
-          description: 'Email addresses for warmup analytics'
-        },
-        email: {
-          type: 'string',
-          description: 'Single email address (alternative to emails array)'
-        },
-        start_date: {
-          type: 'string',
-          description: 'Start date (YYYY-MM-DD, optional)',
-          pattern: '^\\d{4}-\\d{2}-\\d{2}$'
-        },
-        end_date: {
-          type: 'string',
-          description: 'End date (YYYY-MM-DD, optional)',
-          pattern: '^\\d{4}-\\d{2}-\\d{2}$'
-        }
-      },
-      required: [],
-      additionalProperties: false
+        emails: { type: 'array', items: { type: 'string' }, description: 'Account emails' },
+        email: { type: 'string', description: 'Single email (alternative)' },
+        start_date: { type: 'string', description: 'YYYY-MM-DD' },
+        end_date: { type: 'string', description: 'YYYY-MM-DD' }
+      }
     }
   },
 ];
diff --git a/src/tools/campaign-tools.ts b/src/tools/campaign-tools.ts
index da37c73..0ba2e97 100644
--- a/src/tools/campaign-tools.ts
+++ b/src/tools/campaign-tools.ts
@@ -1,7 +1,8 @@
 /**
- * Instantly MCP Server - Campaign Tools
+ * Instantly MCP Server - Campaign Tools (Compacted)
  * 
  * Tool definitions for campaign management operations.
+ * Optimized for minimal context window overhead.
  * Total: 6 campaign tools
  */
 
@@ -11,117 +12,28 @@ export const campaignTools = [
   {
     name: 'create_campaign',
     title: 'Create Campaign',
-    description: 'Create email campaign with two-step workflow. STEP 1: Call with name, subject, body to discover eligible accounts. STEP 2: Call with email_list from Step 1. ⚠️ NEVER use placeholder emails. Multi-step sequences: Use sequence_steps (2-10) and step_delay_days (1-30).',
+    description: 'Create email campaign. Two-step: 1) Call with name/subject/body to discover accounts, 2) Call again with email_list. Use sequence_steps for multi-step sequences.',
+    annotations: { destructiveHint: false },
     inputSchema: {
       type: 'object',
       properties: {
-        // Core required fields
-        name: {
-          type: 'string',
-          description: 'Campaign name for identification (e.g., "Q4 Product Launch Campaign")'
-        },
-        subject: {
-          type: 'string',
-          description: '⚠️ CRITICAL: MUST be under 50 characters for deliverability. Use personalization: {{firstName}}, {{companyName}}. If validation fails, shorten before retrying.'
-        },
-        body: {
-          type: 'string',
-          description: 'Email body (plain text, \\n for line breaks → auto-converts to <br />). Personalization: {{firstName}}, {{lastName}}, {{companyName}}. Get straight to point, high-value content.'
-        },
-        email_list: {
-          type: 'array',
-          items: { type: 'string' },
-          description: '⚠️ SENDER EMAILS (optional). If omitted: Tool fetches eligible accounts and asks user. If provided: ONLY use emails from eligible list shown in Step 1. NEVER use placeholders (test@example.com). Multiple emails = ONE campaign with ALL in single array (max 100).',
-          example: ['john@yourcompany.com', 'jane@yourcompany.com']
-        },
-
-        // Tracking settings (disabled by default for better deliverability)
-        track_opens: {
-          type: 'boolean',
-          description: 'Track when recipients open emails (disabled by default for better deliverability and privacy compliance)',
-          default: false
-        },
-        track_clicks: {
-          type: 'boolean',
-          description: 'Track when recipients click links (disabled by default for better deliverability and privacy compliance)',
-          default: false
-        },
-
-        // Scheduling options
-        timezone: {
-          type: 'string',
-          description: `Timezone for sending schedule. Supported timezones: ${BUSINESS_PRIORITY_TIMEZONES.join(', ')}. Unsupported timezones will be automatically mapped to closest supported timezone.`,
-          default: DEFAULT_TIMEZONE,
-          example: DEFAULT_TIMEZONE
-        },
-        timing_from: {
-          type: 'string',
-          description: 'Start time for sending (24h format)',
-          default: '09:00',
-          pattern: '^([01][0-9]|2[0-3]):([0-5][0-9])$'
-        },
-        timing_to: {
-          type: 'string',
-          description: 'End time for sending (24h format)',
-          default: '17:00',
-          pattern: '^([01][0-9]|2[0-3]):([0-5][0-9])$'
-        },
-
-        // Sending limits
-        daily_limit: {
-          type: 'number',
-          description: 'Maximum emails per day per account (30 recommended for cold email compliance)',
-          default: 30,
-          minimum: 1,
-          maximum: 30
-        },
-        email_gap: {
-          type: 'number',
-          description: 'Minutes between emails from same account (1-1440 minutes)',
-          default: 10,
-          minimum: 1,
-          maximum: 1440
-        },
-
-        // Campaign behavior
-        stop_on_reply: {
-          type: 'boolean',
-          description: 'Stop campaign when recipient replies',
-          default: true
-        },
-
-        // Advanced options (optional)
-        stop_on_auto_reply: {
-          type: 'boolean',
-          description: 'Stop campaign when auto-reply is detected (out-of-office, etc.)',
-          default: true
-        },
-
-        // Multi-step sequence configuration
-        sequence_steps: {
-          type: 'number',
-          description: 'Number of steps in the email sequence (optional, default: 1 for single email, max: 10).\n\n⚠️ MULTI-STEP CAMPAIGNS SUPPORTED:\n• Set to 2 or more to create follow-up sequences\n• Step 1 sends immediately when campaign starts\n• Each step waits step_delay_days before sending next step\n• Example: sequence_steps=3 with step_delay_days=2 creates:\n  Step 1 → Wait 2 days → Step 2 → Wait 2 days → Step 3\n\nUse this for cold outreach sequences, nurture campaigns, and follow-up workflows.',
-          minimum: 1,
-          maximum: 10,
-          default: 1
-        },
-        step_delay_days: {
-          type: 'number',
-          description: 'Days to wait AFTER sending each step before sending the next step (optional, default: 3 days).\n\n⚠️ DELAY BEHAVIOR:\n• Applies to ALL steps in the sequence (including Step 1)\n• Step 1: delay=X (wait X days after Step 1 before Step 2)\n• Step 2: delay=X (wait X days after Step 2 before Step 3)\n• Best practices: Use 2-7 days for cold outreach\n• Only used when sequence_steps > 1',
-          minimum: 1,
-          maximum: 30,
-          default: 3
-        },
-        sequence_subjects: {
-          type: 'array',
-          items: { type: 'string' },
-          description: 'Optional: Custom subject lines for each step (array of strings). Must match sequence_steps count. If not provided, follow-ups use "Follow-up: {original subject}". Example: ["Initial Email", "Follow-up 1", "Follow-up 2"]'
-        },
-        sequence_bodies: {
-          type: 'array',
-          items: { type: 'string' },
-          description: 'Optional: Custom email bodies for each step (array of strings). Must match sequence_steps count. Use \\n for line breaks. If not provided, follow-ups use auto-generated content. Example: ["Hi {{firstName}},...", "Following up...", "Last attempt..."]'
-        }
+        name: { type: 'string', description: 'Campaign name' },
+        subject: { type: 'string', description: 'Subject (<50 chars). Personalization: {{firstName}}, {{companyName}}' },
+        body: { type: 'string', description: 'Email body (\\n for line breaks). Personalization: {{firstName}}, {{lastName}}, {{companyName}}' },
+        email_list: { type: 'array', items: { type: 'string' }, description: 'Sender emails (from Step 1 eligible list)' },
+        track_opens: { type: 'boolean', default: false },
+        track_clicks: { type: 'boolean', default: false },
+        timezone: { type: 'string', default: DEFAULT_TIMEZONE, description: `Supported: ${BUSINESS_PRIORITY_TIMEZONES.slice(0, 5).join(', ')}...` },
+        timing_from: { type: 'string', default: '09:00', description: '24h format' },
+        timing_to: { type: 'string', default: '17:00', description: '24h format' },
+        daily_limit: { type: 'number', default: 30, description: 'Emails/day/account (max 30)' },
+        email_gap: { type: 'number', default: 10, description: 'Minutes between emails (1-1440)' },
+        stop_on_reply: { type: 'boolean', default: true },
+        stop_on_auto_reply: { type: 'boolean', default: true },
+        sequence_steps: { type: 'number', default: 1, description: 'Steps in sequence (1-10)' },
+        step_delay_days: { type: 'number', default: 3, description: 'Days between steps (1-30)' },
+        sequence_subjects: { type: 'array', items: { type: 'string' }, description: 'Custom subjects per step' },
+        sequence_bodies: { type: 'array', items: { type: 'string' }, description: 'Custom bodies per step' }
       },
       required: ['name', 'subject', 'body']
     }
@@ -130,204 +42,97 @@ export const campaignTools = [
   {
     name: 'list_campaigns',
     title: 'List Campaigns',
-    description: 'List campaigns with pagination. Filter by search (name only). Use exact cursor from next_starting_after. Filter by status client-side.',
+    description: 'List campaigns with pagination. Filter by name search or tags.',
+    annotations: { readOnlyHint: true },
     inputSchema: {
       type: 'object',
       properties: {
-        limit: {
-          type: 'number',
-          description: 'Number of items per page (1-100, default: 100)',
-          minimum: 1,
-          maximum: 100
-        },
-        starting_after: {
-          type: 'string',
-          description: 'Pagination cursor from previous response. CRITICAL: Use the EXACT value from response.pagination.next_starting_after field (NOT a campaign ID from the data). Example: If previous response had "next_starting_after": "cursor123", use starting_after="cursor123". Omit for first page.'
-        },
-        search: {
-          type: 'string',
-          description: 'Search campaigns by campaign NAME only (optional). CRITICAL: Do NOT use this for status filtering (e.g., do NOT search for "running", "active", "paused"). Only use when user explicitly wants to find a campaign by its name. Examples: search="Product Launch", search="Q4 Campaign". Leave empty to list all campaigns.'
-        },
-        tag_ids: {
-          type: 'string',
-          description: 'Filter by tag IDs, comma-separated (optional)'
-        }
-      },
-      additionalProperties: false
+        limit: { type: 'number', description: '1-100, default: 100' },
+        starting_after: { type: 'string', description: 'Cursor from pagination.next_starting_after' },
+        search: { type: 'string', description: 'Search by campaign NAME only (not status)' },
+        tag_ids: { type: 'string', description: 'Comma-separated tag IDs' }
+      }
     }
   },
 
   {
     name: 'get_campaign',
     title: 'Get Campaign',
-    description: 'Get complete campaign details by ID. Returns configuration, sequences, schedules, sender accounts, tracking settings, and status.',
+    description: 'Get campaign details: config, sequences, schedules, sender accounts, tracking, status',
+    annotations: { readOnlyHint: true },
     inputSchema: {
       type: 'object',
       properties: {
-        campaign_id: { type: 'string', description: 'Campaign ID (UUID) - REQUIRED. Get from list_campaigns if you don\'t have it. Example: "9a309ee6-2908-4158-a2c5-431c9bfadf40"' }
+        campaign_id: { type: 'string', description: 'Campaign UUID' }
       },
-      required: ['campaign_id'],
-      additionalProperties: false
+      required: ['campaign_id']
     }
   },
 
   {
     name: 'update_campaign',
     title: 'Update Campaign',
-    description: 'Update campaign settings (partial updates). Only provide fields to change. Common: name, sequences, tracking, limits, email_list.',
+    description: 'Update campaign settings (partial). Common: name, sequences, tracking, limits, email_list.',
+    annotations: { destructiveHint: false },
     inputSchema: {
       type: 'object',
       properties: {
-        campaign_id: {
-          type: 'string',
-          description: 'REQUIRED: ID of the existing campaign to modify. This parameter is mandatory.'
-        },
-        name: {
-          type: 'string',
-          description: 'OPTIONAL: New campaign name to UPDATE the existing campaign name. Only provide this if you want to CHANGE the campaign name.'
-        },
-        pl_value: {
-          type: 'number',
-          description: 'OPTIONAL: New positive lead value to UPDATE. Only provide this if you want to MODIFY the pl_value setting.'
-        },
-        is_evergreen: {
-          type: 'boolean',
-          description: 'OPTIONAL: New evergreen status to UPDATE. Only provide this if you want to CHANGE whether the campaign is evergreen.'
-        },
-        campaign_schedule: {
-          type: 'object',
-          description: 'OPTIONAL: New schedule configuration to UPDATE the existing campaign schedule. Only provide this if you want to MODIFY the schedule settings.',
-          properties: {
-            schedules: {
-              type: 'array',
-              items: {
-                type: 'object'
-              }
-            }
-          }
-        },
-        sequences: {
-          type: 'array',
-          description: 'OPTIONAL: New email sequences to UPDATE the existing sequences. Only provide this if you want to MODIFY the email sequences.',
-          items: {
-            type: 'object'
-          }
-        },
-        email_gap: {
-          type: 'number',
-          description: 'OPTIONAL: New email gap value (in minutes) to UPDATE. Only provide this if you want to CHANGE the gap between emails.'
-        },
-        random_wait_max: {
-          type: 'number',
-          description: 'OPTIONAL: New maximum random wait time (in minutes) to UPDATE. Only provide this if you want to MODIFY the random wait setting.'
-        },
-        text_only: {
-          type: 'boolean',
-          description: 'OPTIONAL: New text-only setting to UPDATE. Only provide this if you want to CHANGE whether the campaign is text only.'
-        },
-        email_list: {
-          type: 'array',
-          description: 'OPTIONAL: New list of account emails to UPDATE for sending. Only provide this if you want to MODIFY which email accounts are used.',
-          items: { type: 'string' }
-        },
-        daily_limit: {
-          type: 'number',
-          description: 'OPTIONAL: New daily sending limit to UPDATE per account. Only provide this if you want to CHANGE the daily limit.'
-        },
-        stop_on_reply: {
-          type: 'boolean',
-          description: 'OPTIONAL: New stop-on-reply setting to UPDATE. Only provide this if you want to MODIFY whether the campaign stops on reply.'
-        },
-        email_tag_list: {
-          type: 'array',
-          description: 'OPTIONAL: New list of email tag UUIDs to UPDATE. Only provide this if you want to CHANGE the email tags.',
-          items: { type: 'string' }
-        },
-        link_tracking: {
-          type: 'boolean',
-          description: 'OPTIONAL: New link tracking setting to UPDATE. Only provide this if you want to MODIFY whether links are tracked.'
-        },
-        open_tracking: {
-          type: 'boolean',
-          description: 'OPTIONAL: New open tracking setting to UPDATE. Only provide this if you want to MODIFY whether opens are tracked.'
-        },
-        stop_on_auto_reply: {
-          type: 'boolean',
-          description: 'OPTIONAL: New stop-on-auto-reply setting to UPDATE. Only provide this if you want to CHANGE whether to stop on auto-replies.'
-        },
-        daily_max_leads: {
-          type: 'number',
-          description: 'OPTIONAL: New daily maximum leads value to UPDATE. Only provide this if you want to MODIFY the daily max leads setting.'
-        },
-        prioritize_new_leads: {
-          type: 'boolean',
-          description: 'OPTIONAL: New prioritize-new-leads setting to UPDATE. Only provide this if you want to CHANGE the lead prioritization.'
-        },
-        auto_variant_select: {
-          type: 'object',
-          description: 'OPTIONAL: New auto variant selection settings to UPDATE. Only provide this if you want to MODIFY the auto variant selection configuration.'
-        },
-        match_lead_esp: {
-          type: 'boolean',
-          description: 'OPTIONAL: New match-lead-ESP setting to UPDATE. Only provide this if you want to CHANGE whether to match leads by ESP.'
-        },
-        stop_for_company: {
-          type: 'boolean',
-          description: 'OPTIONAL: New stop-for-company setting to UPDATE. Only provide this if you want to MODIFY whether to stop for entire company on reply.'
-        },
-        insert_unsubscribe_header: {
-          type: 'boolean',
-          description: 'OPTIONAL: New unsubscribe header setting to UPDATE. Only provide this if you want to CHANGE whether to insert unsubscribe headers.'
-        },
-        allow_risky_contacts: {
-          type: 'boolean',
-          description: 'OPTIONAL: New risky contacts setting to UPDATE. Only provide this if you want to MODIFY whether to allow risky contacts.'
-        },
-        disable_bounce_protect: {
-          type: 'boolean',
-          description: 'OPTIONAL: New bounce protection setting to UPDATE. Only provide this if you want to CHANGE whether bounce protection is disabled.'
-        },
-        cc_list: {
-          type: 'array',
-          description: 'OPTIONAL: New CC email addresses list to UPDATE. Only provide this if you want to MODIFY the CC list.',
-          items: { type: 'string' }
-        },
-        bcc_list: {
-          type: 'array',
-          description: 'OPTIONAL: New BCC email addresses list to UPDATE. Only provide this if you want to MODIFY the BCC list.',
-          items: { type: 'string' }
-        }
+        campaign_id: { type: 'string', description: 'Campaign to update' },
+        name: { type: 'string' },
+        pl_value: { type: 'number' },
+        is_evergreen: { type: 'boolean' },
+        campaign_schedule: { type: 'object', properties: { schedules: { type: 'array', items: { type: 'object' } } } },
+        sequences: { type: 'array', items: { type: 'object' } },
+        email_gap: { type: 'number' },
+        random_wait_max: { type: 'number' },
+        text_only: { type: 'boolean' },
+        email_list: { type: 'array', items: { type: 'string' } },
+        daily_limit: { type: 'number' },
+        stop_on_reply: { type: 'boolean' },
+        email_tag_list: { type: 'array', items: { type: 'string' } },
+        link_tracking: { type: 'boolean' },
+        open_tracking: { type: 'boolean' },
+        stop_on_auto_reply: { type: 'boolean' },
+        daily_max_leads: { type: 'number' },
+        prioritize_new_leads: { type: 'boolean' },
+        auto_variant_select: { type: 'object' },
+        match_lead_esp: { type: 'boolean' },
+        stop_for_company: { type: 'boolean' },
+        insert_unsubscribe_header: { type: 'boolean' },
+        allow_risky_contacts: { type: 'boolean' },
+        disable_bounce_protect: { type: 'boolean' },
+        cc_list: { type: 'array', items: { type: 'string' } },
+        bcc_list: { type: 'array', items: { type: 'string' } }
       },
-      required: ['campaign_id'],
-      additionalProperties: false
+      required: ['campaign_id']
     }
   },
 
   {
     name: 'activate_campaign',
     title: 'Activate Campaign',
-    description: 'Activate campaign to start sending. ⚠️ Prerequisites: sender accounts, leads, sequences, schedule. Verify with get_campaign first.',
+    description: 'Start sending. Prerequisites: accounts, leads, sequences, schedule.',
+    annotations: { destructiveHint: false },
     inputSchema: {
       type: 'object',
       properties: {
-        campaign_id: { type: 'string', description: 'Campaign ID (UUID) to activate. Get from list_campaigns or create_campaign. Example: "9a309ee6-2908-4158-a2c5-431c9bfadf40"' }
+        campaign_id: { type: 'string', description: 'Campaign UUID to activate' }
       },
-      required: ['campaign_id'],
-      additionalProperties: false
+      required: ['campaign_id']
     }
   },
 
   {
     name: 'pause_campaign',
     title: 'Pause Campaign',
-    description: 'Pause active campaign to stop sending. Leads remain in campaign. Use activate_campaign to resume. Only works on Active campaigns.',
+    description: 'Stop sending (leads remain). Use activate_campaign to resume.',
+    annotations: { destructiveHint: false },
     inputSchema: {
       type: 'object',
       properties: {
-        campaign_id: { type: 'string', description: 'Campaign ID (UUID, must be Active)' }
+        campaign_id: { type: 'string', description: 'Active campaign UUID' }
       },
-      required: ['campaign_id'],
-      additionalProperties: false
+      required: ['campaign_id']
     }
   },
 ];
diff --git a/src/tools/email-tools.ts b/src/tools/email-tools.ts
index a85e9f3..f2885ed 100644
--- a/src/tools/email-tools.ts
+++ b/src/tools/email-tools.ts
@@ -1,7 +1,8 @@
 /**
- * Instantly MCP Server - Email Tools
+ * Instantly MCP Server - Email Tools (Compacted)
  *
- * Tool definitions for email management and communication operations.
+ * Tool definitions for email management operations.
+ * Optimized for minimal context window overhead.
  * Total: 5 email tools
  */
 
@@ -9,29 +10,29 @@ export const emailTools = [
   {
     name: 'list_emails',
     title: 'List Emails',
-    description: 'List emails with pagination. Filter by campaign_id, search, account, or type. Use exact cursor from next_starting_after.',
+    description: 'List emails with pagination. Filter by campaign, account, type, or status.',
+    annotations: { readOnlyHint: true },
     inputSchema: {
       type: 'object',
       properties: {
-        limit: { type: 'number', description: 'Items per page (1-100, default: 100)', minimum: 1, maximum: 100 },
-        starting_after: { type: 'string', description: 'Cursor from next_starting_after' },
-        search: { type: 'string', description: 'Email/thread search (use "thread:UUID")' },
-        campaign_id: { type: 'string', description: 'Campaign ID (recommended)' },
+        limit: { type: 'number', description: '1-100, default: 100' },
+        starting_after: { type: 'string', description: 'Cursor from pagination' },
+        search: { type: 'string', description: 'Search (use "thread:UUID" for threads)' },
+        campaign_id: { type: 'string' },
         i_status: { type: 'number', description: 'Interest status' },
-        eaccount: { type: 'string', description: 'Sender account (comma-separated)' },
-        is_unread: { type: 'boolean', description: 'Unread filter' },
-        has_reminder: { type: 'boolean', description: 'Reminder filter' },
-        mode: { type: 'string', description: 'Mode filter', enum: ['emode_focused', 'emode_others', 'emode_all'] },
-        preview_only: { type: 'boolean', description: 'Preview only' },
-        sort_order: { type: 'string', description: 'Sort order', enum: ['asc', 'desc'] },
-        scheduled_only: { type: 'boolean', description: 'Scheduled only' },
-        assigned_to: { type: 'string', description: 'Assigned user ID' },
+        eaccount: { type: 'string', description: 'Sender accounts (comma-separated)' },
+        is_unread: { type: 'boolean' },
+        has_reminder: { type: 'boolean' },
+        mode: { type: 'string', enum: ['emode_focused', 'emode_others', 'emode_all'] },
+        preview_only: { type: 'boolean' },
+        sort_order: { type: 'string', enum: ['asc', 'desc'] },
+        scheduled_only: { type: 'boolean' },
+        assigned_to: { type: 'string' },
         lead: { type: 'string', description: 'Lead email' },
-        company_domain: { type: 'string', description: 'Company domain' },
-        marked_as_done: { type: 'boolean', description: 'Marked as done' },
-        email_type: { type: 'string', description: 'Email type', enum: ['received', 'sent', 'manual'] }
-      },
-      additionalProperties: false
+        company_domain: { type: 'string' },
+        marked_as_done: { type: 'boolean' },
+        email_type: { type: 'string', enum: ['received', 'sent', 'manual'] }
+      }
     }
   },
 
@@ -39,72 +40,61 @@ export const emailTools = [
     name: 'get_email',
     title: 'Get Email',
     description: 'Get email details by ID',
+    annotations: { readOnlyHint: true },
     inputSchema: {
       type: 'object',
       properties: {
-        email_id: { type: 'string', description: 'Email ID' }
+        email_id: { type: 'string', description: 'Email UUID' }
       },
-      required: ['email_id'],
-      additionalProperties: false
+      required: ['email_id']
     }
   },
 
   {
     name: 'reply_to_email',
     title: 'Reply to Email',
-    description: '🚨 SENDS REAL EMAILS! ⚠️ ALWAYS confirm with user BEFORE calling. Cannot undo! Requires reply_to_uuid, eaccount, subject, body.',
+    description: '🚨 SENDS REAL EMAIL! Confirm with user first. Cannot undo!',
+    annotations: { destructiveHint: true, confirmationRequiredHint: true },
     inputSchema: {
       type: 'object',
       properties: {
-        reply_to_uuid: {
-          type: 'string',
-          description: 'Email UUID to reply to (from list_emails)'
-        },
-        eaccount: {
-          type: 'string',
-          description: 'Sender account (must be active)'
-        },
-        subject: {
-          type: 'string',
-          description: 'Subject line (e.g., "Re: [original]")'
-        },
+        reply_to_uuid: { type: 'string', description: 'Email UUID to reply to' },
+        eaccount: { type: 'string', description: 'Sender account (must be active)' },
+        subject: { type: 'string', description: 'Subject line' },
         body: {
           type: 'object',
-          description: 'Email body (html/text or both)',
           properties: {
-            html: { type: 'string', description: 'HTML content' },
-            text: { type: 'string', description: 'Plain text content' }
-          },
-          additionalProperties: false
+            html: { type: 'string' },
+            text: { type: 'string' }
+          }
         }
       },
-      required: ['reply_to_uuid', 'eaccount', 'subject', 'body'],
-      additionalProperties: false
+      required: ['reply_to_uuid', 'eaccount', 'subject', 'body']
     }
   },
 
   {
     name: 'count_unread_emails',
-    title: 'Count Unread Emails',
-    description: 'Count unread emails in inbox (read-only)',
+    title: 'Count Unread',
+    description: 'Count unread emails in inbox',
+    annotations: { readOnlyHint: true },
     inputSchema: {
       type: 'object',
-      properties: {},
-      additionalProperties: false
+      properties: {}
     }
   },
 
   {
     name: 'verify_email',
     title: 'Verify Email',
-    description: 'Verify email deliverability (5-45s). Returns status, score, reason, flags. For bulk verification, use verify_leads_on_import in create_lead.',
+    description: 'Verify email deliverability (5-45s). Returns status, score, flags.',
+    annotations: { readOnlyHint: true },
     inputSchema: {
       type: 'object',
       properties: {
-        email: { type: 'string', description: 'Email to verify (user@domain.com)' }
+        email: { type: 'string', description: 'Email to verify' }
       },
-      required: ['email'],
-      additionalProperties: false
+      required: ['email']
     }
   },
 ];
diff --git a/src/tools/index.ts b/src/tools/index.ts
index 1cd7e86..fa0e64c 100644
--- a/src/tools/index.ts
+++ b/src/tools/index.ts
@@ -1,15 +1,18 @@
 /**
- * Instantly MCP Server - Tools Registry
+ * Instantly MCP Server - Tools Registry (Optimized v2.0)
  *
- * Central registry that combines all tool definitions from different categories.
- * This file exports the complete TOOLS_DEFINITION array used by the MCP server.
+ * Central registry combining all tool definitions.
+ * Optimized for minimal context window overhead with:
+ * - Compacted descriptions
+ * - Consolidated duplicate tools
+ * - MCP 2025-06-18 annotations support
  *
- * Total: 36 tools across 5 categories
- * - Account tools: 11 tools
- * - Campaign tools: 6 tools
- * - Lead tools: 11 tools (includes bulk import, delete, and move)
- * - Email tools: 5 tools
- * - Analytics tools: 3 tools
+ * Total: 31 tools across 5 categories (reduced from 36)
+ * - Account tools: 6 (consolidated from 11)
+ * - Campaign tools: 6
+ * - Lead tools: 11
+ * - Email tools: 5
+ * - Analytics tools: 3
  */
 
 import { accountTools } from './account-tools.js';
@@ -25,13 +28,13 @@ import { analyticsTools } from './analytics-tools.js';
  * Tools are organized by category for better maintainability.
  */
 export const TOOLS_DEFINITION = [
-  // Account Management Tools (11 tools)
+  // Account Management Tools (6 tools - consolidated)
   ...accountTools,
 
   // Campaign Management Tools (6 tools)
   ...campaignTools,
 
-  // Lead Management Tools (11 tools - includes bulk import, delete, and move)
+  // Lead Management Tools (11 tools)
   ...leadTools,
 
   // Email Management Tools (5 tools)
@@ -85,9 +88,9 @@ export function validateToolDefinitions(): { valid: boolean; errors: string[] }
     }
   }
 
-  // Validate expected count
-  if (TOOLS_DEFINITION.length !== 36) {
-    errors.push(`Expected 36 tools, found ${TOOLS_DEFINITION.length}`);
+  // Validate expected count (31 after consolidation)
+  if (TOOLS_DEFINITION.length !== 31) {
+    errors.push(`Expected 31 tools, found ${TOOLS_DEFINITION.length}`);
   }
 
   return {
diff --git a/src/tools/lead-tools.ts b/src/tools/lead-tools.ts
index 4df4b9c..6e41140 100644
--- a/src/tools/lead-tools.ts
+++ b/src/tools/lead-tools.ts
@@ -1,67 +1,32 @@
 /**
- * Instantly MCP Server - Lead Tools
+ * Instantly MCP Server - Lead Tools (Compacted)
  *
- * Tool definitions for lead and lead list management operations.
- * Total: 11 lead tools (includes bulk import, delete, and move)
+ * Tool definitions for lead and lead list management.
+ * Optimized for minimal context window overhead.
+ * Total: 11 lead tools
  */
 
 export const leadTools = [
   {
     name: 'list_leads',
     title: 'List Leads',
-    description: 'List leads with pagination. Filter by campaign, list, search, or status. Use exact cursor from pagination.next_starting_after.',
+    description: 'List leads with pagination. Filter by campaign, list, search, or status.',
+    annotations: { readOnlyHint: true },
     inputSchema: {
       type: 'object',
       properties: {
-        // Basic filtering parameters
-        campaign: { type: 'string', description: 'Campaign ID to filter leads (UUID format)' },
-        list_id: { type: 'string', description: 'List ID to filter leads (UUID format)' },
-        list_ids: {
-          type: 'array',
-          items: { type: 'string' },
-          description: 'Filter by multiple list IDs (optional). Example: ["list1", "list2"]'
-        },
-        status: { type: 'string', description: 'Filter by lead status (optional)' },
-
-        // Date filtering (client-side)
-        created_after: {
-          type: 'string',
-          description: 'Filter leads created after this date (YYYY-MM-DD format). Client-side filtering applied after retrieval. Example: "2025-09-01"',
-          pattern: '^\\d{4}-\\d{2}-\\d{2}$'
-        },
-        created_before: {
-          type: 'string',
-          description: 'Filter leads created before this date (YYYY-MM-DD format). Client-side filtering applied after retrieval. Example: "2025-09-30"',
-          pattern: '^\\d{4}-\\d{2}-\\d{2}$'
-        },
-
-        // Search and filtering
-        search: {
-          type: 'string',
-          description: 'Search string to search leads by First Name, Last Name, or Email. Example: "John Doe"'
-        },
-        filter: {
-          type: 'string',
-          description: 'Contact status filter. Values: FILTER_VAL_CONTACTED (replied), FILTER_VAL_NOT_CONTACTED (not contacted), FILTER_VAL_COMPLETED (completed), FILTER_VAL_UNSUBSCRIBED (unsubscribed), FILTER_VAL_ACTIVE (active), FILTER_LEAD_INTERESTED (interested), FILTER_LEAD_MEETING_BOOKED (meeting booked), FILTER_LEAD_CLOSED (closed/won)'
-        },
-        distinct_contacts: {
-          type: 'boolean',
-          description: 'Group leads by email address (true) or show all instances (false). Default: false. Use true to deduplicate by email.'
-        },
-
-        // Pagination
-        limit: {
-          type: 'number',
-          description: 'Number of items per page (1-100, default: 100)',
-          minimum: 1,
-          maximum: 100
-        },
-        starting_after: {
-          type: 'string',
-          description: 'Pagination cursor from previous response. CRITICAL: Use the EXACT value from response.pagination.next_starting_after field (NOT a lead ID or email from the data). Example: If previous response had "next_starting_after": "cursor_abc123", use starting_after="cursor_abc123". Omit for first page.'
-        }
-      },
-      additionalProperties: false
+        campaign: { type: 'string', description: 'Campaign UUID' },
+        list_id: { type: 'string', description: 'List UUID' },
+        list_ids: { type: 'array', items: { type: 'string' } },
+        status: { type: 'string' },
+        created_after: { type: 'string', description: 'YYYY-MM-DD' },
+        created_before: { type: 'string', description: 'YYYY-MM-DD' },
+        search: { type: 'string', description: 'Name or email' },
+        filter: { type: 'string', description: 'FILTER_VAL_CONTACTED, FILTER_VAL_NOT_CONTACTED, FILTER_VAL_COMPLETED, FILTER_VAL_ACTIVE, etc.' },
+        distinct_contacts: { type: 'boolean', description: 'Dedupe by email' },
+        limit: { type: 'number', description: '1-100, default: 100' },
+        starting_after: { type: 'string', description: 'Cursor from pagination.next_starting_after' }
+      }
     }
   },
 
@@ -69,299 +34,217 @@ export const leadTools = [
     name: 'get_lead',
     title: 'Get Lead',
     description: 'Get lead details by ID',
+    annotations: { readOnlyHint: true },
     inputSchema: {
       type: 'object',
       properties: {
-        lead_id: { type: 'string', description: 'Lead ID (UUID)' }
+        lead_id: { type: 'string', description: 'Lead UUID' }
       },
-      required: ['lead_id'],
-      additionalProperties: false
+      required: ['lead_id']
     }
   },
 
   {
     name: 'create_lead',
     title: 'Create Lead',
-    description: 'Create lead with custom variables. ⚠️ When using campaign_id, match custom_variables to existing campaign fields. Use skip_if_in_campaign to prevent duplicates.',
+    description: 'Create lead with custom variables. Use skip_if_in_campaign to prevent duplicates.',
+    annotations: { destructiveHint: false },
     inputSchema: {
       type: 'object',
       properties: {
-        campaign: { type: 'string', description: 'Campaign ID (UUID)' },
-        email: { type: 'string', description: 'Email (required, user@domain.com)' },
-        first_name: { type: 'string', description: 'First name' },
-        last_name: { type: 'string', description: 'Last name' },
-        company_name: { type: 'string', description: 'Company name' },
-        phone: { type: 'string', description: 'Phone' },
-        website: { type: 'string', description: 'Website URL' },
-        personalization: { type: 'string', description: 'Custom message' },
-        lt_interest_status: { type: 'number', description: 'Interest status (-3 to 4)', minimum: -3, maximum: 4 },
-        pl_value_lead: { type: 'string', description: 'Lead value (e.g., "$5000")' },
-        list_id: { type: 'string', description: 'List ID (UUID)' },
-        assigned_to: { type: 'string', description: 'User ID to assign' },
-        skip_if_in_workspace: { type: 'boolean', description: 'Skip if email exists in workspace', default: false },
-        skip_if_in_campaign: { type: 'boolean', description: 'Skip if email exists in campaign (recommended)', default: false },
-        skip_if_in_list: { type: 'boolean', description: 'Skip if email exists in list', default: false },
-        blocklist_id: { type: 'string', description: 'Blocklist ID to check' },
-        verify_leads_for_lead_finder: { type: 'boolean', description: 'Enable lead finder verification', default: false },
-        verify_leads_on_import: { type: 'boolean', description: 'Verify email before import (adds 2-5s)', default: false },
-        custom_variables: {
-          type: 'object',
-          description: '⚠️ Ask user about campaign variables first! Match exact field names. Examples: {"headcount": "50-100", "revenue": "$1M-$5M"}'
-        }
-      },
-      required: [],
-      additionalProperties: false
+        campaign: { type: 'string', description: 'Campaign UUID' },
+        email: { type: 'string', description: 'Required' },
+        first_name: { type: 'string' },
+        last_name: { type: 'string' },
+        company_name: { type: 'string' },
+        phone: { type: 'string' },
+        website: { type: 'string' },
+        personalization: { type: 'string' },
+        lt_interest_status: { type: 'number', description: '-3 to 4' },
+        pl_value_lead: { type: 'string' },
+        list_id: { type: 'string' },
+        assigned_to: { type: 'string' },
+        skip_if_in_workspace: { type: 'boolean' },
+        skip_if_in_campaign: { type: 'boolean', description: 'Recommended' },
+        skip_if_in_list: { type: 'boolean' },
+        blocklist_id: { type: 'string' },
+        verify_leads_on_import: { type: 'boolean' },
+        custom_variables: { type: 'object', description: 'Match campaign field names' }
+      }
     }
   },
 
   {
     name: 'update_lead',
     title: 'Update Lead',
-    description: 'Update lead (partial updates). ⚠️ custom_variables replaces entire object - include all existing fields. Get current data with get_lead first.',
+    description: 'Update lead (partial). ⚠️ custom_variables replaces entire object.',
+    annotations: { destructiveHint: false },
     inputSchema: {
       type: 'object',
       properties: {
-        lead_id: { type: 'string', description: 'Lead ID (UUID, required)' },
-        personalization: { type: 'string', description: 'Custom message' },
-        website: { type: 'string', description: 'Website URL' },
-        last_name: { type: 'string', description: 'Last name' },
-        first_name: { type: 'string', description: 'First name' },
-        company_name: { type: 'string', description: 'Company name' },
-        phone: { type: 'string', description: 'Phone' },
-        lt_interest_status: { type: 'number', description: 'Interest status (-3 to 4)', minimum: -3, maximum: 4 },
-        pl_value_lead: { type: 'string', description: 'Lead value' },
-        assigned_to: { type: 'string', description: 'User UUID to assign' },
-        custom_variables: {
-          type: 'object',
-          description: '⚠️ REPLACES entire object! Include ALL existing + new fields. Get current with get_lead first.'
-        }
+        lead_id: { type: 'string', description: 'Lead UUID' },
+        personalization: { type: 'string' },
+        website: { type: 'string' },
+        last_name: { type: 'string' },
+        first_name: { type: 'string' },
+        company_name: { type: 'string' },
+        phone: { type: 'string' },
+        lt_interest_status: { type: 'number' },
+        pl_value_lead: { type: 'string' },
+        assigned_to: { type: 'string' },
+        custom_variables: { type: 'object', description: 'Replaces all - include existing!' }
       },
-      required: ['lead_id'],
-      additionalProperties: false
+      required: ['lead_id']
     }
   },
 
   {
     name: 'list_lead_lists',
     title: 'List Lead Lists',
-    description: 'List lead lists with pagination. Filter by search or enrichment status. Use exact cursor from pagination field.',
+    description: 'List lead lists with pagination and search',
+    annotations: { readOnlyHint: true },
     inputSchema: {
       type: 'object',
       properties: {
-        limit: { type: 'number', description: 'Number of items to return (1-100, default: 100)', minimum: 1, maximum: 100 },
-        starting_after: { type: 'string', description: 'Pagination cursor (timestamp) from previous response. CRITICAL: Use the EXACT value from response pagination field (NOT constructed manually). The API returns the correct cursor. Omit for first page.' },
-        has_enrichment_task: { type: 'boolean', description: 'Filter by enrichment task status - true returns only lists with enrichment enabled, false returns only lists without enrichment' },
-        search: { type: 'string', description: 'Search query to filter lead lists by name (e.g., "Summer 2025 List")' }
-      },
-      additionalProperties: false
+        limit: { type: 'number', description: '1-100, default: 100' },
+        starting_after: { type: 'string', description: 'Cursor from pagination' },
+        has_enrichment_task: { type: 'boolean' },
+        search: { type: 'string', description: 'Search by name' }
+      }
     }
   },
 
   {
     name: 'create_lead_list',
     title: 'Create Lead List',
-    description: 'Create lead list to organize leads by source/segment. Set has_enrichment_task=true to auto-enrich data.',
+    description: 'Create list. Set has_enrichment_task=true for auto-enrich.',
+    annotations: { destructiveHint: false },
     inputSchema: {
       type: 'object',
       properties: {
-        name: { type: 'string', description: 'List name (e.g., "LinkedIn Prospects Q1 2025")' },
-        has_enrichment_task: { type: 'boolean', description: 'Auto-enrich lead data (default: false)', default: false },
-        owned_by: { type: 'string', description: 'Owner user ID (UUID)' }
+        name: { type: 'string', description: 'List name' },
+        has_enrichment_task: { type: 'boolean' },
+        owned_by: { type: 'string', description: 'Owner UUID' }
       },
-      required: ['name'],
-      additionalProperties: false
+      required: ['name']
     }
   },
 
   {
     name: 'update_lead_list',
     title: 'Update Lead List',
-    description: 'Update lead list (name, enrichment, owner). Partial updates supported.',
+    description: 'Update list name, enrichment, or owner',
+    annotations: { destructiveHint: false },
     inputSchema: {
       type: 'object',
       properties: {
-        list_id: { type: 'string', description: 'Lead list ID (UUID)' },
-        name: { type: 'string', description: 'New name' },
-        has_enrichment_task: { type: 'boolean', description: 'Enable/disable enrichment' },
-        owned_by: { type: 'string', description: 'New owner user ID' }
+        list_id: { type: 'string' },
+        name: { type: 'string' },
+        has_enrichment_task: { type: 'boolean' },
+        owned_by: { type: 'string' }
       },
-      required: ['list_id'],
-      additionalProperties: false
+      required: ['list_id']
     }
   },
 
   {
     name: 'get_verification_stats_for_lead_list',
-    title: 'Get Verification Stats',
-    description: 'Get email verification statistics for lead list (verified, invalid, risky, catch-all, pending)',
+    title: 'Verification Stats',
+    description: 'Get email verification stats for list',
+    annotations: { readOnlyHint: true },
     inputSchema: {
       type: 'object',
       properties: {
-        list_id: { type: 'string', description: 'Lead list ID (UUID)' }
+        list_id: { type: 'string', description: 'List UUID' }
       },
-      required: ['list_id'],
-      additionalProperties: false
+      required: ['list_id']
     }
   },
 
   {
     name: 'add_leads_to_campaign_or_list_bulk',
     title: 'Bulk Add Leads',
-    description: 'Bulk add up to 1,000 leads to campaign OR list. 10-100x faster than individual create_lead. Use skip_if_in_campaign to prevent duplicates.',
+    description: 'Add up to 1,000 leads. 10-100x faster than create_lead.',
+    annotations: { destructiveHint: false },
     inputSchema: {
       type: 'object',
       properties: {
         leads: {
           type: 'array',
-          description: 'Lead objects (1-1000). Each: email, first_name, last_name, company_name, phone, website, personalization, lt_interest_status, pl_value_lead, assigned_to, custom_variables.',
           items: {
             type: 'object',
             properties: {
-              email: { type: 'string', description: 'Email (required for campaigns)' },
-              first_name: { type: 'string', description: 'First name' },
-              last_name: { type: 'string', description: 'Last name' },
-              company_name: { type: 'string', description: 'Company' },
-              phone: { type: 'string', description: 'Phone' },
-              website: { type: 'string', description: 'Website' },
-              personalization: { type: 'string', description: 'Custom message' },
-              lt_interest_status: { type: 'number', description: 'Interest status (-3 to 4)', minimum: -3, maximum: 4 },
-              pl_value_lead: { type: 'string', description: 'Lead value' },
-              assigned_to: { type: 'string', description: 'User UUID' },
-              custom_variables: {
-                type: 'object',
-                description: '⚠️ Align with campaign variables!'
-              }
-            },
-            additionalProperties: false
+              email: { type: 'string' },
+              first_name: { type: 'string' },
+              last_name: { type: 'string' },
+              company_name: { type: 'string' },
+              phone: { type: 'string' },
+              website: { type: 'string' },
+              personalization: { type: 'string' },
+              lt_interest_status: { type: 'number' },
+              pl_value_lead: { type: 'string' },
+              assigned_to: { type: 'string' },
+              custom_variables: { type: 'object' }
+            }
           },
-          minItems: 1,
-          maxItems: 1000
-        },
-        campaign_id: { type: 'string', description: 'Campaign UUID (use this OR list_id)' },
-        list_id: { type: 'string', description: 'List UUID (use this OR campaign_id)' },
-        blocklist_id: { type: 'string', description: 'Blocklist UUID' },
-        assigned_to: { type: 'string', description: 'User UUID for all leads' },
-        verify_leads_on_import: { type: 'boolean', description: 'Verify emails (recommended)', default: false },
-        skip_if_in_workspace: { type: 'boolean', description: 'Skip if exists in workspace', default: false },
-        skip_if_in_campaign: { type: 'boolean', description: 'Skip if exists in campaign (recommended)', default: false },
-        skip_if_in_list: { type: 'boolean', description: 'Skip if exists in list', default: false }
+          description: '1-1000 leads'
+        },
+        campaign_id: { type: 'string', description: 'Use OR list_id' },
+        list_id: { type: 'string', description: 'Use OR campaign_id' },
+        blocklist_id: { type: 'string' },
+        assigned_to: { type: 'string' },
+        verify_leads_on_import: { type: 'boolean' },
+        skip_if_in_workspace: { type: 'boolean' },
+        skip_if_in_campaign: { type: 'boolean', description: 'Recommended' },
+        skip_if_in_list: { type: 'boolean' }
       },
-      required: ['leads'],
-      additionalProperties: false
+      required: ['leads']
     }
   },
 
   {
     name: 'delete_lead',
     title: 'Delete Lead',
-    description: '🗑️ DESTRUCTIVE: Permanently delete lead. ⚠️ CANNOT BE UNDONE! Removes from all campaigns/lists. Always confirm with user first.',
+    description: '🗑️ PERMANENTLY delete. CANNOT UNDO!',
+    annotations: { destructiveHint: true, confirmationRequiredHint: true },
     inputSchema: {
       type: 'object',
       properties: {
-        lead_id: {
-          type: 'string',
-          description: '⚠️ Lead ID to DELETE PERMANENTLY (cannot recover!)'
-        }
+        lead_id: { type: 'string', description: 'Lead UUID to DELETE' }
       },
-      required: ['lead_id'],
-      additionalProperties: false
+      required: ['lead_id']
     }
   },
 
   {
     name: 'move_leads_to_campaign_or_list',
     title: 'Move/Copy Leads',
-    description: 'Move/copy leads between campaigns/lists (background job). Requires to_campaign_id OR to_list_id. Set copy_leads=true to copy instead of move.',
+    description: 'Move or copy leads between campaigns/lists (background job)',
+    annotations: { destructiveHint: false },
     inputSchema: {
       type: 'object',
       properties: {
-        to_campaign_id: {
-          type: 'string',
-          description: 'Destination campaign ID (use this OR to_list_id)'
-        },
-        to_list_id: {
-          type: 'string',
-          description: 'Destination list ID (use this OR to_campaign_id)'
-        },
-        ids: {
-          type: 'array',
-          items: { type: 'string' },
-          description: 'Lead IDs to move'
-        },
-        search: {
-          type: 'string',
-          description: 'Search string (name/email)'
-        },
-        filter: {
-          type: 'string',
-          description: 'Contact status: FILTER_VAL_CONTACTED, FILTER_VAL_NOT_CONTACTED, FILTER_VAL_COMPLETED, FILTER_VAL_UNSUBSCRIBED, FILTER_VAL_ACTIVE, FILTER_LEAD_INTERESTED, FILTER_LEAD_MEETING_BOOKED, FILTER_LEAD_CLOSED'
-        },
-        campaign: {
-          type: 'string',
-          description: 'Source campaign ID'
-        },
-        list_id: {
-          type: 'string',
-          description: 'Source list ID'
-        },
-        in_campaign: {
-          type: 'boolean',
-          description: 'Filter: in campaign (true/false)'
-        },
-        in_list: {
-          type: 'boolean',
-          description: 'Filter: in list (true/false)'
-        },
-        queries: {
-          type: 'array',
-          items: { type: 'object' },
-          description: 'Advanced filters'
-        },
-        excluded_ids: {
-          type: 'array',
-          items: { type: 'string' },
-          description: 'Lead IDs to exclude'
-        },
-        contacts: {
-          type: 'array',
-          items: { type: 'string' },
-          description: 'Email addresses to filter'
-        },
-        check_duplicates_in_campaigns: {
-          type: 'boolean',
-          description: 'Check duplicates (recommended: true)'
-        },
-        skip_leads_in_verification: {
-          type: 'boolean',
-          description: 'Skip leads being verified (recommended: true)'
-        },
-        limit: {
-          type: 'number',
-          description: 'Max leads to move'
-        },
-        assigned_to: {
-          type: 'string',
-          description: 'User ID to assign moved leads'
-        },
-        esp_code: {
-          type: 'number',
-          description: 'ESP code: 0=Queue, 1=Google, 2=Microsoft, 3=Zoho, 9=Yahoo, 10=Yandex, 12=Web.de, 13=Libero.it, 999=Other, 1000=Not Found'
-        },
-        esg_code: {
-          type: 'number',
-          description: 'ESG code: 0=Queue, 1=Barracuda, 2=Mimecast, 3=Proofpoint, 4=Cisco'
-        },
-        copy_leads: {
-          type: 'boolean',
-          description: 'Copy instead of move (default: false)'
-        },
-        check_duplicates: {
-          type: 'boolean',
-          description: 'Check duplicates (default: false)'
-        }
-      },
-      required: [],
-      additionalProperties: false
+        to_campaign_id: { type: 'string', description: 'Destination (OR to_list_id)' },
+        to_list_id: { type: 'string', description: 'Destination (OR to_campaign_id)' },
+        ids: { type: 'array', items: { type: 'string' }, description: 'Lead IDs' },
+        search: { type: 'string' },
+        filter: { type: 'string', description: 'Contact status filter' },
+        campaign: { type: 'string', description: 'Source campaign' },
+        list_id: { type: 'string', description: 'Source list' },
+        in_campaign: { type: 'boolean' },
+        in_list: { type: 'boolean' },
+        queries: { type: 'array', items: { type: 'object' } },
+        excluded_ids: { type: 'array', items: { type: 'string' } },
+        contacts: { type: 'array', items: { type: 'string' } },
+        check_duplicates_in_campaigns: { type: 'boolean' },
+        skip_leads_in_verification: { type: 'boolean' },
+        limit: { type: 'number' },
+        assigned_to: { type: 'string' },
+        esp_code: { type: 'number', description: '0=Queue, 1=Google, 2=MS, etc.' },
+        esg_code: { type: 'number', description: '0=Queue, 1=Barracuda, etc.' },
+        copy_leads: { type: 'boolean', description: 'Copy instead of move' },
+        check_duplicates: { type: 'boolean' }
+      }
     }
   },
 ];

From 73391a0da636c82e8964b561592076f44dc1a5ad Mon Sep 17 00:00:00 2001
From: Brandon Charleson <170791+bcharleson@users.noreply.github.com>
Date: Tue, 25 Nov 2025 10:04:05 -0600
Subject: [PATCH 10/14] fix: disable tool pagination by default (Cursor doesn't
 support it yet)

---
 src/config/tool-pagination.ts | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/config/tool-pagination.ts b/src/config/tool-pagination.ts
index b54d82b..09d45a4 100644
--- a/src/config/tool-pagination.ts
+++ b/src/config/tool-pagination.ts
@@ -29,12 +29,15 @@ export interface ToolPaginationConfig {
 /**
  * Default pagination configuration
  * 
- * Returns 10 tools per page by default for optimal context window usage.
- * Clients that don't support pagination will still work but get all tools.
+ * DISABLED BY DEFAULT: Most MCP clients (Cursor, Claude Desktop) don't support
+ * tool pagination yet. Enable via TOOL_PAGINATION_ENABLED=true when clients
+ * support the MCP 2025-06-18 pagination spec.
+ * 
+ * When enabled, returns 10 tools per page for optimal context window usage.
  */
 export const DEFAULT_TOOL_PAGINATION: ToolPaginationConfig = {
   pageSize: 10,
-  enabled: true
+  enabled: false  // Disabled until clients support pagination
 };
 
 /**

From 6ea0dbc88d3de1242408cb55f638fe7636516bb6 Mon Sep 17 00:00:00 2001
From: Brandon Charleson <170791+bcharleson@users.noreply.github.com>
Date: Tue, 25 Nov 2025 10:10:11 -0600
Subject: [PATCH 11/14] feat: add category-based lazy loading via
 TOOL_CATEGORIES env var

---
 src/tools/index.ts | 115 +++++++++++++++++++++++++++++++++++----------
 1 file changed, 91 insertions(+), 24 deletions(-)

diff --git a/src/tools/index.ts b/src/tools/index.ts
index fa0e64c..c86cf5c 100644
--- a/src/tools/index.ts
+++ b/src/tools/index.ts
@@ -6,6 +6,7 @@
  * - Compacted descriptions
  * - Consolidated duplicate tools
  * - MCP 2025-06-18 annotations support
+ * - Category-based lazy loading via TOOL_CATEGORIES env var
  *
  * Total: 31 tools across 5 categories (reduced from 36)
  * - Account tools: 6 (consolidated from 11)
@@ -13,6 +14,12 @@
  * - Lead tools: 11
  * - Email tools: 5
  * - Analytics tools: 3
+ * 
+ * LAZY LOADING:
+ * Set TOOL_CATEGORIES env var to load only specific categories.
+ * Example: TOOL_CATEGORIES="accounts,campaigns" loads only 12 tools
+ * Valid categories: accounts, campaigns, leads, email, analytics
+ * Default: all categories loaded
  */
 
 import { accountTools } from './account-tools.js';
@@ -21,33 +28,78 @@ import { leadTools } from './lead-tools.js';
 import { emailTools } from './email-tools.js';
 import { analyticsTools } from './analytics-tools.js';
 
+// Category mapping for lazy loading
+const CATEGORY_MAP: Record<string, any[]> = {
+  accounts: accountTools,
+  campaigns: campaignTools,
+  leads: leadTools,
+  email: emailTools,
+  analytics: analyticsTools,
+};
+
+/**
+ * Build tools array based on TOOL_CATEGORIES env var
+ * If not set, all categories are loaded (full 31 tools)
+ */
+function buildToolsDefinition(): any[] {
+  const categoriesEnv = process.env.TOOL_CATEGORIES;
+  
+  if (!categoriesEnv) {
+    // Default: load all tools
+    return [
+      ...accountTools,
+      ...campaignTools,
+      ...leadTools,
+      ...emailTools,
+      ...analyticsTools,
+    ];
+  }
+  
+  // Parse comma-separated categories
+  const requestedCategories = categoriesEnv
+    .toLowerCase()
+    .split(',')
+    .map(c => c.trim())
+    .filter(c => c.length > 0);
+  
+  const tools: any[] = [];
+  const loadedCategories: string[] = [];
+  
+  for (const category of requestedCategories) {
+    if (CATEGORY_MAP[category]) {
+      tools.push(...CATEGORY_MAP[category]);
+      loadedCategories.push(category);
+    } else {
+      console.error(`[Instantly MCP] ⚠️ Unknown tool category: "${category}". Valid: ${Object.keys(CATEGORY_MAP).join(', ')}`);
+    }
+  }
+  
+  if (tools.length > 0) {
+    console.error(`[Instantly MCP] 🔧 Lazy loading enabled: ${tools.length} tools from categories: ${loadedCategories.join(', ')}`);
+  } else {
+    console.error(`[Instantly MCP] ⚠️ No valid categories in TOOL_CATEGORIES. Loading all tools.`);
+    return [
+      ...accountTools,
+      ...campaignTools,
+      ...leadTools,
+      ...emailTools,
+      ...analyticsTools,
+    ];
+  }
+  
+  return tools;
+}
+
 /**
  * Complete tool definitions array
  * 
  * This array is used by the MCP server to register all available tools.
- * Tools are organized by category for better maintainability.
+ * Tools are filtered by TOOL_CATEGORIES env var if set.
  */
-export const TOOLS_DEFINITION = [
-  // Account Management Tools (6 tools - consolidated)
-  ...accountTools,
-
-  // Campaign Management Tools (6 tools)
-  ...campaignTools,
-
-  // Lead Management Tools (11 tools)
-  ...leadTools,
-
-  // Email Management Tools (5 tools)
-  ...emailTools,
-
-  // Analytics & Reporting Tools (3 tools)
-  ...analyticsTools,
-];
+export const TOOLS_DEFINITION = buildToolsDefinition();
 
 /**
- * Tool count by category
- * 
- * Useful for validation and debugging
+ * Tool count by category (reflects loaded tools, not all available)
  */
 export const TOOL_COUNTS = {
   account: accountTools.length,
@@ -55,9 +107,24 @@ export const TOOL_COUNTS = {
   lead: leadTools.length,
   email: emailTools.length,
   analytics: analyticsTools.length,
-  total: TOOLS_DEFINITION.length,
+  loaded: TOOLS_DEFINITION.length,
+  maxAvailable: 31,  // Total when all categories loaded
 };
 
+/**
+ * Get available categories for lazy loading
+ */
+export function getAvailableCategories(): string[] {
+  return Object.keys(CATEGORY_MAP);
+}
+
+/**
+ * Check if lazy loading is active
+ */
+export function isLazyLoadingEnabled(): boolean {
+  return !!process.env.TOOL_CATEGORIES;
+}
+
 /**
  * Validate tool definitions
  * 
@@ -88,9 +155,9 @@ export function validateToolDefinitions(): { valid: boolean; errors: string[] }
     }
   }
 
-  // Validate expected count (31 after consolidation)
-  if (TOOLS_DEFINITION.length !== 31) {
-    errors.push(`Expected 31 tools, found ${TOOLS_DEFINITION.length}`);
+  // Dynamic validation: check loaded count is reasonable
+  if (TOOLS_DEFINITION.length === 0) {
+    errors.push('No tools loaded - check TOOL_CATEGORIES env var');
   }
 
   return {

From f0bbf62f07c161b7d927b3df12b4297adeddb2d6 Mon Sep 17 00:00:00 2001
From: Brandon Charleson <170791+bcharleson@users.noreply.github.com>
Date: Tue, 25 Nov 2025 10:27:22 -0600
Subject: [PATCH 12/14] fix: GET /mcp returns immediately - no SSE blocking
 (fixes Cursor loading)

---
 src/streaming-http-transport.ts | 69 ++++++---------------------------
 1 file changed, 12 insertions(+), 57 deletions(-)

diff --git a/src/streaming-http-transport.ts b/src/streaming-http-transport.ts
index e80cd2b..ccb912a 100644
--- a/src/streaming-http-transport.ts
+++ b/src/streaming-http-transport.ts
@@ -590,81 +590,36 @@ export class StreamingHttpTransport {
       });
     });
 
-    // GET endpoint for MCP clients (supports SSE for Claude.ai proxy)
-    this.app.get('/mcp/:apiKey?', async (req, res) => {
+    // GET endpoint for MCP clients
+    // IMPORTANT: Returns immediately - no blocking on SSE setup
+    // Cursor and most MCP clients use POST for actual communication
+    this.app.get('/mcp/:apiKey?', (req, res) => {
       const apiKey = req.params.apiKey;
       const acceptHeader = req.headers.accept || '';
-      const protocolVersion = req.headers['mcp-protocol-version'] as string;
 
       console.error(`[HTTP] 🔍 GET /mcp request - API Key: ${apiKey ? '✅ Present' : '❌ Missing'}`);
       console.error(`[HTTP] 📋 Accept: ${acceptHeader}`);
-      console.error(`[HTTP] 🔖 Protocol Version: ${protocolVersion || 'Not provided'}`);
 
-      // Validate MCP-Protocol-Version header (backward compatible)
-      // Per MCP spec: if no header provided, assume 2025-03-26 for backward compatibility
-      if (protocolVersion && !['2025-06-18', '2025-03-26', '2024-11-05'].includes(protocolVersion)) {
-        console.error(`[HTTP] ❌ Unsupported protocol version: ${protocolVersion}`);
-        return res.status(400).json({
-          error: 'Bad Request',
-          message: `Unsupported MCP protocol version: ${protocolVersion}. Supported: 2025-06-18, 2025-03-26 (recommended), 2024-11-05`
-        });
-      }
-
-      if (acceptHeader.includes('text/event-stream')) {
-        // Client wants SSE stream - support for Claude.ai proxy
-        console.error('[HTTP] 📡 SSE connection requested - starting SSE transport');
-        console.error(`[HTTP] 📡 API Key: ${apiKey ? '✅ Present' : '❌ Missing'}`);
-
-        try {
-          const transport = new SSEServerTransport('/messages', res);
-          this.sseTransports.set(transport.sessionId, transport);
-
-          // CRITICAL FIX: Store API key with SSE session so tool calls can access it
-          this.sseSessionMetadata.set(transport.sessionId, { apiKey });
-          console.error(`[HTTP] 📡 SSE session metadata stored - API Key: ${apiKey ? '✅ Present' : '❌ Missing'}`);
-
-          console.error(`[HTTP] 📡 SSE transport created with session ID: ${transport.sessionId}`);
-          console.error(`[HTTP] 📡 Active SSE sessions: ${this.sseTransports.size}`);
-
-          res.on('close', () => {
-            console.error(`[HTTP] 📡 SSE connection closed for session ${transport.sessionId}`);
-            this.sseTransports.delete(transport.sessionId);
-            this.sseSessionMetadata.delete(transport.sessionId); // Clean up metadata
-            console.error(`[HTTP] 📡 Remaining SSE sessions: ${this.sseTransports.size}`);
-          });
-
-          await this.server.connect(transport);
-          console.error(`[HTTP] ✅ SSE transport connected successfully - session ID: ${transport.sessionId}`);
-        } catch (error) {
-          console.error('[HTTP] ❌ Failed to establish SSE connection:', error);
-          console.error('[HTTP] ❌ Error stack:', error instanceof Error ? error.stack : 'No stack trace');
-
-          if (!res.headersSent) {
-            res.status(500).json({
-              error: 'Internal Server Error',
-              message: `Failed to establish SSE connection: ${error instanceof Error ? error.message : String(error)}`
-            });
-          }
-        }
-        return;
-      }
-
-      // Return server info for GET requests
+      // For ALL GET requests, return server info immediately
+      // This ensures Cursor and other clients don't hang on discovery
+      // Actual MCP communication happens via POST
       res.json({
         server: 'instantly-mcp',
         version: '1.2.0',
         transport: 'streamable-http',
         protocol: '2025-06-18',
+        tools: TOOLS_DEFINITION.length,
         endpoints: {
           'mcp_post': apiKey ? `/mcp/${apiKey}` : '/mcp',
-          'messages_post': '/messages',
           'health': '/health',
           'info': '/info'
         },
         auth: {
           required: true,
-          methods: ['path_parameter', 'header']
-        }
+          methods: ['path_parameter', 'header'],
+          note: 'Use POST to /mcp/{API_KEY} for MCP communication'
+        },
+        status: 'ready'
       });
     });
 

From a2ebc94badfa9a5430a577090610e85ee3a4eca5 Mon Sep 17 00:00:00 2001
From: Brandon Charleson <170791+bcharleson@users.noreply.github.com>
Date: Tue, 25 Nov 2025 10:29:49 -0600
Subject: [PATCH 13/14] fix: use POST for MCP endpoints, GET for discovery
 (fixes Cursor)

---
 src/streaming-http-transport.ts | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/streaming-http-transport.ts b/src/streaming-http-transport.ts
index ccb912a..d741641 100644
--- a/src/streaming-http-transport.ts
+++ b/src/streaming-http-transport.ts
@@ -413,8 +413,9 @@ export class StreamingHttpTransport {
     });
 
     // Main MCP endpoint with header-based authentication
-    // ALSO accepts API key in custom header for Claude Desktop compatibility
-    this.app.all('/mcp', async (req, res) => {
+    // Uses POST only - MCP protocol uses JSON-RPC over POST
+    // GET requests handled separately for discovery
+    this.app.post('/mcp', async (req, res) => {
       // VERBOSE LOGGING FOR CLAUDE DESKTOP/WEB DEBUGGING
       console.error('[HTTP] ========== INCOMING MCP REQUEST (HEADER AUTH) ==========');
       console.error('[HTTP] 🔍 FULL REQUEST HEADERS:', JSON.stringify(req.headers, null, 2));
@@ -443,7 +444,8 @@ export class StreamingHttpTransport {
     });
 
     // URL-based authentication endpoint: /mcp/{API_KEY}
-    this.app.all('/mcp/:apiKey', async (req, res) => {
+    // Uses POST only - MCP protocol uses JSON-RPC over POST
+    this.app.post('/mcp/:apiKey', async (req, res) => {
       // Extract API key from URL path
       let apiKey = req.params.apiKey;
 

From ed373937db4ef72bbcd030b997334620fe6e1a94 Mon Sep 17 00:00:00 2001
From: "dependabot[bot]" <49699333+dependabot[bot]@users.noreply.github.com>
Date: Mon, 1 Dec 2025 19:47:33 +0000
Subject: [PATCH 14/14] chore(deps-dev): bump tsx from 4.20.6 to 4.21.0

Bumps [tsx](https://github.com/privatenumber/tsx) from 4.20.6 to 4.21.0.
- [Release notes](https://github.com/privatenumber/tsx/releases)
- [Changelog](https://github.com/privatenumber/tsx/blob/master/release.config.cjs)
- [Commits](https://github.com/privatenumber/tsx/compare/v4.20.6...v4.21.0)

---
updated-dependencies:
- dependency-name: tsx
  dependency-version: 4.21.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
---
 package-lock.json | 496 +++++++++++++++++++++++++++++++++++++++++++---
 package.json      |   2 +-
 2 files changed, 465 insertions(+), 33 deletions(-)

diff --git a/package-lock.json b/package-lock.json
index d661bdd..65918e0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -28,7 +28,7 @@
         "@babel/traverse": "^7.27.4",
         "@babel/types": "^7.27.6",
         "@types/babel__traverse": "^7.20.7",
-        "tsx": "^4.7.0"
+        "tsx": "^4.21.0"
       },
       "engines": {
         "node": ">=18.0.0"
@@ -152,8 +152,78 @@
         "node": ">=6.9.0"
       }
     },
+    "node_modules/@esbuild/aix-ppc64": {
+      "version": "0.27.0",
+      "resolved": "https://registry.npmjs.org/@esbuild/aix-ppc64/-/aix-ppc64-0.27.0.tgz",
+      "integrity": "sha512-KuZrd2hRjz01y5JK9mEBSD3Vj3mbCvemhT466rSuJYeE/hjuBrHfjjcjMdTm/sz7au+++sdbJZJmuBwQLuw68A==",
+      "cpu": [
+        "ppc64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "aix"
+      ],
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@esbuild/android-arm": {
+      "version": "0.27.0",
+      "resolved": "https://registry.npmjs.org/@esbuild/android-arm/-/android-arm-0.27.0.tgz",
+      "integrity": "sha512-j67aezrPNYWJEOHUNLPj9maeJte7uSMM6gMoxfPC9hOg8N02JuQi/T7ewumf4tNvJadFkvLZMlAq73b9uwdMyQ==",
+      "cpu": [
+        "arm"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "android"
+      ],
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@esbuild/android-arm64": {
+      "version": "0.27.0",
+      "resolved": "https://registry.npmjs.org/@esbuild/android-arm64/-/android-arm64-0.27.0.tgz",
+      "integrity": "sha512-CC3vt4+1xZrs97/PKDkl0yN7w8edvU2vZvAFGD16n9F0Cvniy5qvzRXjfO1l94efczkkQE6g1x0i73Qf5uthOQ==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "android"
+      ],
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@esbuild/android-x64": {
+      "version": "0.27.0",
+      "resolved": "https://registry.npmjs.org/@esbuild/android-x64/-/android-x64-0.27.0.tgz",
+      "integrity": "sha512-wurMkF1nmQajBO1+0CJmcN17U4BP6GqNSROP8t0X/Jiw2ltYGLHpEksp9MpoBqkrFR3kv2/te6Sha26k3+yZ9Q==",
+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "android"
+      ],
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/@esbuild/darwin-arm64": {
-      "version": "0.25.5",
+      "version": "0.27.0",
+      "resolved": "https://registry.npmjs.org/@esbuild/darwin-arm64/-/darwin-arm64-0.27.0.tgz",
+      "integrity": "sha512-uJOQKYCcHhg07DL7i8MzjvS2LaP7W7Pn/7uA0B5S1EnqAirJtbyw4yC5jQ5qcFjHK9l6o/MX9QisBg12kNkdHg==",
       "cpu": [
         "arm64"
       ],
@@ -167,6 +237,363 @@
         "node": ">=18"
       }
     },
+    "node_modules/@esbuild/darwin-x64": {
+      "version": "0.27.0",
+      "resolved": "https://registry.npmjs.org/@esbuild/darwin-x64/-/darwin-x64-0.27.0.tgz",
+      "integrity": "sha512-8mG6arH3yB/4ZXiEnXof5MK72dE6zM9cDvUcPtxhUZsDjESl9JipZYW60C3JGreKCEP+p8P/72r69m4AZGJd5g==",
+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "darwin"
+      ],
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@esbuild/freebsd-arm64": {
+      "version": "0.27.0",
+      "resolved": "https://registry.npmjs.org/@esbuild/freebsd-arm64/-/freebsd-arm64-0.27.0.tgz",
+      "integrity": "sha512-9FHtyO988CwNMMOE3YIeci+UV+x5Zy8fI2qHNpsEtSF83YPBmE8UWmfYAQg6Ux7Gsmd4FejZqnEUZCMGaNQHQw==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "freebsd"
+      ],
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@esbuild/freebsd-x64": {
+      "version": "0.27.0",
+      "resolved": "https://registry.npmjs.org/@esbuild/freebsd-x64/-/freebsd-x64-0.27.0.tgz",
+      "integrity": "sha512-zCMeMXI4HS/tXvJz8vWGexpZj2YVtRAihHLk1imZj4efx1BQzN76YFeKqlDr3bUWI26wHwLWPd3rwh6pe4EV7g==",
+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "freebsd"
+      ],
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@esbuild/linux-arm": {
+      "version": "0.27.0",
+      "resolved": "https://registry.npmjs.org/@esbuild/linux-arm/-/linux-arm-0.27.0.tgz",
+      "integrity": "sha512-t76XLQDpxgmq2cNXKTVEB7O7YMb42atj2Re2Haf45HkaUpjM2J0UuJZDuaGbPbamzZ7bawyGFUkodL+zcE+jvQ==",
+      "cpu": [
+        "arm"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@esbuild/linux-arm64": {
+      "version": "0.27.0",
+      "resolved": "https://registry.npmjs.org/@esbuild/linux-arm64/-/linux-arm64-0.27.0.tgz",
+      "integrity": "sha512-AS18v0V+vZiLJyi/4LphvBE+OIX682Pu7ZYNsdUHyUKSoRwdnOsMf6FDekwoAFKej14WAkOef3zAORJgAtXnlQ==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@esbuild/linux-ia32": {
+      "version": "0.27.0",
+      "resolved": "https://registry.npmjs.org/@esbuild/linux-ia32/-/linux-ia32-0.27.0.tgz",
+      "integrity": "sha512-Mz1jxqm/kfgKkc/KLHC5qIujMvnnarD9ra1cEcrs7qshTUSksPihGrWHVG5+osAIQ68577Zpww7SGapmzSt4Nw==",
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+      "optional": true,
+      "os": [
+        "sunos"
+      ],
+      "engines": {
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+      }
+    },
+    "node_modules/@esbuild/win32-arm64": {
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+      "resolved": "https://registry.npmjs.org/@esbuild/win32-arm64/-/win32-arm64-0.27.0.tgz",
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+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "win32"
+      ],
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@esbuild/win32-ia32": {
+      "version": "0.27.0",
+      "resolved": "https://registry.npmjs.org/@esbuild/win32-ia32/-/win32-ia32-0.27.0.tgz",
+      "integrity": "sha512-30z1aKL9h22kQhilnYkORFYt+3wp7yZsHWus+wSKAJR8JtdfI76LJ4SBdMsCopTR3z/ORqVu5L1vtnHZWVj4cQ==",
+      "cpu": [
+        "ia32"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "win32"
+      ],
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@esbuild/win32-x64": {
+      "version": "0.27.0",
+      "resolved": "https://registry.npmjs.org/@esbuild/win32-x64/-/win32-x64-0.27.0.tgz",
+      "integrity": "sha512-aIitBcjQeyOhMTImhLZmtxfdOcuNRpwlPNmlFKPcHQYPhEssw75Cl1TSXJXpMkzaua9FUetx/4OQKq7eJul5Cg==",
+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "win32"
+      ],
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/@jridgewell/gen-mapping": {
       "version": "0.3.13",
       "resolved": "https://registry.npmjs.org/@jridgewell/gen-mapping/-/gen-mapping-0.3.13.tgz",
@@ -824,7 +1251,9 @@
       }
     },
     "node_modules/esbuild": {
-      "version": "0.25.5",
+      "version": "0.27.0",
+      "resolved": "https://registry.npmjs.org/esbuild/-/esbuild-0.27.0.tgz",
+      "integrity": "sha512-jd0f4NHbD6cALCyGElNpGAOtWxSq46l9X/sWB0Nzd5er4Kz2YTm+Vl0qKFT9KUJvD8+fiO8AvoHhFvEatfVixA==",
       "dev": true,
       "hasInstallScript": true,
       "license": "MIT",
@@ -835,31 +1264,32 @@
         "node": ">=18"
       },
       "optionalDependencies": {
-        "@esbuild/aix-ppc64": "0.25.5",
-        "@esbuild/android-arm": "0.25.5",
-        "@esbuild/android-arm64": "0.25.5",
-        "@esbuild/android-x64": "0.25.5",
-        "@esbuild/darwin-arm64": "0.25.5",
-        "@esbuild/darwin-x64": "0.25.5",
-        "@esbuild/freebsd-arm64": "0.25.5",
-        "@esbuild/freebsd-x64": "0.25.5",
-        "@esbuild/linux-arm": "0.25.5",
-        "@esbuild/linux-arm64": "0.25.5",
-        "@esbuild/linux-ia32": "0.25.5",
-        "@esbuild/linux-loong64": "0.25.5",
-        "@esbuild/linux-mips64el": "0.25.5",
-        "@esbuild/linux-ppc64": "0.25.5",
-        "@esbuild/linux-riscv64": "0.25.5",
-        "@esbuild/linux-s390x": "0.25.5",
-        "@esbuild/linux-x64": "0.25.5",
-        "@esbuild/netbsd-arm64": "0.25.5",
-        "@esbuild/netbsd-x64": "0.25.5",
-        "@esbuild/openbsd-arm64": "0.25.5",
-        "@esbuild/openbsd-x64": "0.25.5",
-        "@esbuild/sunos-x64": "0.25.5",
-        "@esbuild/win32-arm64": "0.25.5",
-        "@esbuild/win32-ia32": "0.25.5",
-        "@esbuild/win32-x64": "0.25.5"
+        "@esbuild/aix-ppc64": "0.27.0",
+        "@esbuild/android-arm": "0.27.0",
+        "@esbuild/android-arm64": "0.27.0",
+        "@esbuild/android-x64": "0.27.0",
+        "@esbuild/darwin-arm64": "0.27.0",
+        "@esbuild/darwin-x64": "0.27.0",
+        "@esbuild/freebsd-arm64": "0.27.0",
+        "@esbuild/freebsd-x64": "0.27.0",
+        "@esbuild/linux-arm": "0.27.0",
+        "@esbuild/linux-arm64": "0.27.0",
+        "@esbuild/linux-ia32": "0.27.0",
+        "@esbuild/linux-loong64": "0.27.0",
+        "@esbuild/linux-mips64el": "0.27.0",
+        "@esbuild/linux-ppc64": "0.27.0",
+        "@esbuild/linux-riscv64": "0.27.0",
+        "@esbuild/linux-s390x": "0.27.0",
+        "@esbuild/linux-x64": "0.27.0",
+        "@esbuild/netbsd-arm64": "0.27.0",
+        "@esbuild/netbsd-x64": "0.27.0",
+        "@esbuild/openbsd-arm64": "0.27.0",
+        "@esbuild/openbsd-x64": "0.27.0",
+        "@esbuild/openharmony-arm64": "0.27.0",
+        "@esbuild/sunos-x64": "0.27.0",
+        "@esbuild/win32-arm64": "0.27.0",
+        "@esbuild/win32-ia32": "0.27.0",
+        "@esbuild/win32-x64": "0.27.0"
       }
     },
     "node_modules/escape-html": {
@@ -893,6 +1323,7 @@
     "node_modules/express": {
       "version": "4.21.2",
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "accepts": "~1.3.8",
         "array-flatten": "1.1.1",
@@ -1632,13 +2063,13 @@
       }
     },
     "node_modules/tsx": {
-      "version": "4.20.6",
-      "resolved": "https://registry.npmjs.org/tsx/-/tsx-4.20.6.tgz",
-      "integrity": "sha512-ytQKuwgmrrkDTFP4LjR0ToE2nqgy886GpvRSpU0JAnrdBYppuY5rLkRUYPU1yCryb24SsKBTL/hlDQAEFVwtZg==",
+      "version": "4.21.0",
+      "resolved": "https://registry.npmjs.org/tsx/-/tsx-4.21.0.tgz",
+      "integrity": "sha512-5C1sg4USs1lfG0GFb2RLXsdpXqBSEhAaA/0kPL01wxzpMqLILNxIxIOKiILz+cdg/pLnOUxFYOR5yhHU666wbw==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "esbuild": "~0.25.0",
+        "esbuild": "~0.27.0",
         "get-tsconfig": "^4.7.5"
       },
       "bin": {
@@ -1727,6 +2158,7 @@
     "node_modules/zod": {
       "version": "3.25.76",
       "license": "MIT",
+      "peer": true,
       "funding": {
         "url": "https://github.com/sponsors/colinhacks"
       }
diff --git a/package.json b/package.json
index dec5ebf..c2ad976 100644
--- a/package.json
+++ b/package.json
@@ -61,7 +61,7 @@
     "@babel/traverse": "^7.27.4",
     "@babel/types": "^7.27.6",
     "@types/babel__traverse": "^7.20.7",
-    "tsx": "^4.7.0"
+    "tsx": "^4.21.0"
   },
   "engines": {
     "node": ">=18.0.0"