diff --git a/gitnexus/src/mcp/tools.ts b/gitnexus/src/mcp/tools.ts
index a34587e5d7..1d634d2063 100644
--- a/gitnexus/src/mcp/tools.ts
+++ b/gitnexus/src/mcp/tools.ts
@@ -28,12 +28,6 @@ export interface ToolDefinition {
       }
     >;
     required: string[];
-    /**
-     * JSON-Schema `anyOf` for cross-property constraints `required` cannot express
-     * — e.g. "at least one of route/file". Forwarded verbatim to clients by the
-     * server's ListTools handler, so MCP clients see the constraint.
-     */
-    anyOf?: Array<{ required: string[] }>;
   };
 }
 
@@ -796,9 +790,6 @@ Response shape is keyed on how many routes match, not on the data: exactly one m
         repo: { type: 'string', description: 'Repository name or path.' },
       },
       required: [],
-      // Exactly one lookup key is needed, but either works (route wins if both
-      // are passed) — so the structural constraint is "at least one of route/file".
-      anyOf: [{ required: ['route'] }, { required: ['file'] }],
     },
   },
   {
diff --git a/gitnexus/test/unit/tools.test.ts b/gitnexus/test/unit/tools.test.ts
index 23bb79606d..3681016285 100644
--- a/gitnexus/test/unit/tools.test.ts
+++ b/gitnexus/test/unit/tools.test.ts
@@ -134,14 +134,15 @@ describe('GITNEXUS_TOOLS', () => {
     expect(contextTool.inputSchema.properties.file).toMatchObject({ type: 'string' });
   });
 
-  it('api_impact tool expresses the route-or-file requirement via anyOf (#2308)', () => {
+  it('api_impact tool avoids top-level schema combinators for Bedrock compatibility (#2487)', () => {
     const apiImpactTool = GITNEXUS_TOOLS.find((t) => t.name === 'api_impact')!;
-    expect(apiImpactTool.inputSchema.anyOf).toEqual([
-      { required: ['route'] },
-      { required: ['file'] },
-    ]);
-    // route/file stay optional in `required` (anyOf carries the cross-field rule)
+    expect(apiImpactTool.inputSchema).not.toHaveProperty('anyOf');
+    expect(apiImpactTool.inputSchema).not.toHaveProperty('oneOf');
+    expect(apiImpactTool.inputSchema).not.toHaveProperty('allOf');
+    // route/file stay optional in the transport schema; callTool keeps the
+    // runtime guard so providers that reject top-level combinators can load it.
     expect(apiImpactTool.inputSchema.required).toEqual([]);
+    expect(apiImpactTool.description).toContain('Requires at least "route" or "file"');
   });
 
   it('impact tool requires direction and advertises target, name, or symbol without combinators', () => {