fix(core): refine CliHelpAgent description for better delegation (#23310)

evals/cli_help_delegation.eval.ts

@@ -0,0 +1,25 @@
+import { describe, expect } from 'vitest';
+import { evalTest } from './test-helper.js';
+
+describe('CliHelpAgent Delegation', () => {
+  evalTest('USUALLY_PASSES', {
+    name: 'should delegate to cli_help agent for subagent creation questions',
+    params: {
+      settings: {
+        experimental: {
+          enableAgents: true,
+        },
+      },
+    },
+    prompt: 'Help me create a subagent in this project',
+    timeout: 60000,
+    assert: async (rig, _result) => {
+      const toolLogs = rig.readToolLogs();
+      const toolCallIndex = toolLogs.findIndex(
+        (log) => log.toolRequest.name === 'cli_help',
+      );
+      expect(toolCallIndex).toBeGreaterThan(-1);
+      expect(toolCallIndex).toBeLessThan(5); // Called within first 5 turns
+    },
+  });
+});