Test prompt does not trigger the expected tool in `Cloud Architect`

[Menghua1]

Description:
When entering the test prompt Help me create a cloud service that will serve as ATM for users, the expected tool azmcp_cloudarchitect_design is not triggered, as shown below:

Steps to Reproduce:

1. Start mcp server in namespaces mode.
2. Open GitHub Copilot in VS Code and switch to Agent mode.
3. Click Refresh on the tools list, and select the Built-in, Extension: Github Copilot for Azure, MCP Server: Microsoft Docs, github MCP server and MCP Server: Azure MCP.
4. Enter test prompts Help me create a cloud service that will serve as ATM for users

Environment:

• OS: Windows.
• Vscode Version: 1.105
• GitHub Copilot Chat Version: 0.31.3
• Large Language Model: GPT-4.1
• Virtual Tool: On
• Azure MCP Server: 0.8.6

Expected Behavior:
The test prompt Help me create a cloud service that will serve as ATM for users can successfully trigger the expected tool azmcp_cloudarchitect_design.

@joshfree for notification

[joshfree]

@qianwens PTAL for October release