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Azure MCP learn=true calls time out after 180s in Copilot CLI 1.0.83-5

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評估

難度
4/5
預估耗時
3-5 天
新手友好度
45/100
Issue 類型
缺陷
描述清晰度
基本清楚
活躍度
活躍
技術堆疊
azure
領域
cli, cloud

研究方向

從 Copilot CLI 的 MCP 階層式工具探索路徑開始,在 1.0.83-5 和 1.0.80 版本上使用 learn=true 重現報告中的 Azure 呼叫。比較探索行為,同時確認直接呼叫子命令仍然成功;完成標準是兩個階層式探測都能及時回傳其 schema,而不是在 180 秒後逾時。

由索引模型根據 Issue 內容生成。

描述

area:mcp
Describe the bug

Azure MCP hierarchical tool discovery calls using learn=true consistently time out after 180 seconds in Copilot CLI 1.0.83-5. The same calls complete in about 0.2 seconds under CLI 1.0.80.

Direct Azure MCP child-command calls without learn=true still succeed, which isolates the regression to hierarchical tool discovery rather than MCP startup, authentication, or general Azure connectivity.

Affected version

GitHub Copilot CLI 1.0.83-5
Windows executable file/product version: 1.0.83-5

Steps to reproduce the behavior
  1. Configure the Microsoft Azure MCP server and confirm it connects.
  2. Start Copilot CLI 1.0.83-5.
  3. Ask the agent to make exactly one Azure Kusto MCP call with: {"intent":"Discover the Kusto command contract","learn":true}
  4. Observe that the call remains pending for 180 seconds and fails with: MCP server 'azure': McpError: MCP error -32001: Request timed out
  5. Repeat with Azure get_azure_bestpractices and learn=true; it fails the same way.
  6. Run the same probes with CLI 1.0.80; both discovery calls succeed immediately.

Controlled A/B results:

CLI Azure MCP tool Mode Result Duration
1.0.80 kusto learn=true success 0.175s
1.0.80 kusto learn=true success 0.197s
1.0.80 get_azure_bestpractices learn=true success 0.212s
1.0.83-5 kusto learn=true timeout 180.050s
1.0.83-5 kusto learn=true timeout 180.079s
1.0.83-5 get_azure_bestpractices learn=true timeout 180.060s
1.0.83-5 kusto direct kusto_query success 7.103s

The fresh Kusto and Best Practices A/B probes were launched simultaneously under both CLI versions with the same model, workspace, MCP configuration, and machine. All probe stderr logs were empty.

Expected behavior

learn=true should return the hierarchical tool command schema promptly, as it does under CLI 1.0.80, instead of reaching the client's 180-second timeout.

Additional context
  • OS: Windows 11 Enterprise 23H2, build 22631
  • Architecture: AMD64
  • Shell: PowerShell 7.6.5
  • Terminal: VS Code integrated terminal
  • Azure MCP reached connected before each probe
  • Reproduced 3/3 times on 1.0.83-5
  • Control succeeded 3/3 times on 1.0.80
  • No exact duplicate found in the open or closed github/copilot-cli issues
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環境準備

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  • 沒有 Pull Request 範本
  • 閱讀貢獻指南

從這裡開始

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  3. Fork 儲存庫,在一個分支上完成修改。
  4. 送出 Pull Request,並在描述裡引用這個 Issue 編號。

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