From 83d4663da1b16037fe57ebfef6f48a4b9fb38086 Mon Sep 17 00:00:00 2001
From: rainerkruschwitz <rainkru@gmail.com>
Date: Fri, 6 Mar 2026 11:33:43 +0100
Subject: [PATCH] fix(schema): use []string for QueryDatalogInput.Inputs to
 satisfy Gemini API

When using graphthulhu with Google Gemini-based AI clients, tool
registration fails with HTTP 400:

  tools[N].function_declarations[0].parameters.properties[inputs].items: missing field

The root cause: []any generates a JSON Schema array without an 'items'
field. Anthropic's API accepts this silently; Google's API rejects it.

Fix: change Inputs to []string. DataScript bindings are scalar values
that can be represented as strings. A conversion loop in QueryDatalog
bridges []string back to []any for the internal DatascriptQuery call.
---
 .gitignore      | 2 ++
 tools/search.go | 6 +++++-
 types/tools.go  | 2 +-
 3 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/.gitignore b/.gitignore
index 7b8cc3f..9b02c96 100644
--- a/.gitignore
+++ b/.gitignore
@@ -26,3 +26,5 @@ CLAUDE.md
 # OS
 .DS_Store
 Thumbs.db
+*.exe
+*.bak
diff --git a/tools/search.go b/tools/search.go
index 6190a55..1770bc1 100644
--- a/tools/search.go
+++ b/tools/search.go
@@ -180,7 +180,11 @@ func (s *Search) QueryProperties(ctx context.Context, req *mcp.CallToolRequest,
 
 // QueryDatalog executes raw DataScript queries.
 func (s *Search) QueryDatalog(ctx context.Context, req *mcp.CallToolRequest, input types.QueryDatalogInput) (*mcp.CallToolResult, any, error) {
-	raw, err := s.client.DatascriptQuery(ctx, input.Query, input.Inputs...)
+	anyInputs := make([]any, len(input.Inputs))
+	for i, v := range input.Inputs {
+		anyInputs[i] = v
+	}
+	raw, err := s.client.DatascriptQuery(ctx, input.Query, anyInputs...)
 	if err != nil {
 		return errorResult(fmt.Sprintf("Datalog query failed: %v", err)), nil, nil
 	}
diff --git a/types/tools.go b/types/tools.go
index 3fa7cfd..8adffe6 100644
--- a/types/tools.go
+++ b/types/tools.go
@@ -55,7 +55,7 @@ type QueryPropertiesInput struct {
 
 type QueryDatalogInput struct {
 	Query  string `json:"query" jsonschema:"Datalog/DataScript query string"`
-	Inputs []any  `json:"inputs,omitempty" jsonschema:"Query input bindings"`
+	Inputs []string `json:"inputs,omitempty" jsonschema:"Query input bindings (string representations)"`
 }
 
 type FindByTagInput struct {