1 files changed, 37 insertions, 0 deletions
diff --git a/packages/core/src/tools/shell.test.ts b/packages/core/src/tools/shell.test.ts
index 7f237e3d..55720af5 100644
--- a/packages/core/src/tools/shell.test.ts
+++ b/packages/core/src/tools/shell.test.ts
@@ -25,6 +25,7 @@ vi.mock('../utils/summarizer.js');
 
 import { isCommandAllowed } from '../utils/shell-utils.js';
 import { ShellTool } from './shell.js';
+import { ToolErrorType } from './tool-error.js';
 import { type Config } from '../config/config.js';
 import {
   type ShellExecutionResult,
@@ -203,6 +204,42 @@ describe('ShellTool', () => {
       expect(result.llmContent).not.toContain('pgrep');
     });
 
+    it('should return error with error property for invalid parameters', async () => {
+      const result = await shellTool.execute(
+        { command: '' }, // Empty command is invalid
+        mockAbortSignal,
+      );
+
+      expect(result.llmContent).toContain(
+        'Could not execute command due to invalid parameters:',
+      );
+      expect(result.returnDisplay).toBe('Command cannot be empty.');
+      expect(result.error).toEqual({
+        message: 'Command cannot be empty.',
+        type: ToolErrorType.INVALID_TOOL_PARAMS,
+      });
+    });
+
+    it('should return error with error property for invalid directory', async () => {
+      vi.mocked(fs.existsSync).mockReturnValue(false);
+      const result = await shellTool.execute(
+        { command: 'ls', directory: 'nonexistent' },
+        mockAbortSignal,
+      );
+
+      expect(result.llmContent).toContain(
+        'Could not execute command due to invalid parameters:',
+      );
+      expect(result.returnDisplay).toBe(
+        "Directory 'nonexistent' is not a registered workspace directory.",
+      );
+      expect(result.error).toEqual({
+        message:
+          "Directory 'nonexistent' is not a registered workspace directory.",
+        type: ToolErrorType.INVALID_TOOL_PARAMS,
+      });
+    });
+
     it('should summarize output when configured', async () => {
       (mockConfig.getSummarizeToolOutputConfig as Mock).mockReturnValue({
         [shellTool.name]: { tokenBudget: 1000 },