add absolute file path description for windows (#12007)

packages/core/src/tools/edit.test.ts

@@ -36,6 +36,14 @@ vi.mock('../telemetry/loggers.js', () => ({
   logFileOperation: vi.fn(),
 }));
 
+interface EditFileParameterSchema {
+  properties: {
+    file_path: {
+      description: string;
+    };
+  };
+}
+
 import type { Mock } from 'vitest';
 import { describe, it, expect, beforeEach, afterEach, vi } from 'vitest';
 import type { EditToolParams } from './edit.js';
@@ -1025,6 +1033,38 @@ describe('EditTool', () => {
     });
   });
 
+  describe('constructor', () => {
+    afterEach(() => {
+      vi.restoreAllMocks();
+    });
+
+    it('should use windows-style path examples on windows', () => {
+      vi.spyOn(process, 'platform', 'get').mockReturnValue('win32');
+
+      const tool = new EditTool({} as unknown as Config);
+      const schema = tool.schema;
+      expect(
+        (schema.parametersJsonSchema as EditFileParameterSchema).properties
+          .file_path.description,
+      ).toBe(
+        "The absolute path to the file to modify (e.g., 'C:\\Users\\project\\file.txt'). Must be an absolute path.",
+      );
+    });
+
+    it('should use unix-style path examples on non-windows platforms', () => {
+      vi.spyOn(process, 'platform', 'get').mockReturnValue('linux');
+
+      const tool = new EditTool({} as unknown as Config);
+      const schema = tool.schema;
+      expect(
+        (schema.parametersJsonSchema as EditFileParameterSchema).properties
+          .file_path.description,
+      ).toBe(
+        "The absolute path to the file to modify (e.g., '/home/user/project/file.txt'). Must start with '/'.",
+      );
+    });
+  });
+
   describe('IDE mode', () => {
     const testFile = 'edit_me.txt';
     let filePath: string;