Bug: get_project_data and list_tasks fail due to missing .passthrough() in outputSchema

[SirNich0las]

Bug Description

get_project_data and list_tasks tools always return "Tool execution failed" in Claude Desktop, even though the MCP server successfully fetches and returns the correct data from the Dida365 API. get_task works fine.

Root Cause

The outputSchema in get_project_data and list_tasks uses z.object({...}) without .passthrough(), while get_task correctly uses .passthrough().

The Dida365 API returns fields not defined in the schema (e.g., etag, tags, columnId, kind, modifiedTime). Without .passthrough(), Zod's strict validation rejects these extra fields, causing the MCP SDK to report the tool call as failed — even though the server-side API call succeeded.

Evidence

From the MCP server log, the server returns valid JSON for all projects:

Message from server: {"jsonrpc":"2.0","id":17,"result":{"content":[...], 
"structuredContent":{"project":{...},"tasks":[{"id":"...","etag":"854td1r1","kind":"TEXT","modifiedTime":"..."}],...}}}

But Claude Desktop reports: Tool execution failed

Meanwhile, get_task (which has .passthrough()) works perfectly for the same tasks.

Affected Files

• src/tools/project/get-project-data.ts — outputSchema for project, task, and column objects
• src/tools/task/list-tasks.ts — outputSchema for the result object

Fix

Add .passthrough() to all z.object() calls in outputSchema:

get-project-data.ts (3 changes):

  outputSchema: {
      project: z.object({
          ...
          sortOrder: z.number().optional(),
-     }),
+     }).passthrough(),
      tasks: z.array(z.object({
          ...
          items: z.array(z.any()).optional(),
-     })).optional(),
+     }).passthrough()).optional(),
      columns: z.array(z.object({
          ...
          sortOrder: z.number().optional(),
-     })).optional(),
+     }).passthrough()).optional(),
  },

list-tasks.ts (1 change):

  outputSchema: z.object({
      tasks: z.array(z.any()),
      total: z.number(),
      filtered: z.boolean(),
      projects: z.array(z.string()),
- }),
+ }).passthrough(),

Additional Note

list-projects.ts has the same pattern (z.array(z.object({...})) without .passthrough()) and may break if the API ever returns additional fields for projects. Consider adding .passthrough() there as well for future-proofing.

Environment

• Package version: 0.2.2
• Client: Claude Desktop (Windows 11)
• Node.js: v22.x