bug: My tool was not getting listed, Getting "Servers still loading"

### Checks

- [x] I have searched [github.com/aws/amazon-q-developer-cli/issues](https://github.com/aws/amazon-q-developer-cli/issues?q=) and there are no duplicates of my issue

### Operating system

WIndows

### Expected behaviour

My tool should get listed,

I configured mcp.json as
`{
"mcpServers": {
"ConfusingCalculator": {
"command": "uv",
"args": ["run", "/mnt/c/WorkFolder/Sample/MCP/weather/weather.py"],
"transport": "stdio"
}
}
}`

And the server logs

`DEBUG:mcp.server.lowlevel.server:Initializing server 'ConfusingCalculator'
DEBUG:mcp.server.lowlevel.server:Registering handler for ListToolsRequest
DEBUG:mcp.server.lowlevel.server:Registering handler for CallToolRequest
DEBUG:mcp.server.lowlevel.server:Registering handler for ListResourcesRequest
DEBUG:mcp.server.lowlevel.server:Registering handler for ReadResourceRequest
DEBUG:mcp.server.lowlevel.server:Registering handler for PromptListRequest
DEBUG:mcp.server.lowlevel.server:Registering handler for GetPromptRequest
DEBUG:mcp.server.lowlevel.server:Registering handler for ListResourceTemplatesRequest
INFO:__main__:Initializing MCP server...
DEBUG:asyncio:Using selector: EpollSelector
DEBUG:__main__:Registered tools: [Tool(name='add', description='Multiply two numbers together.', inputSchema={'properties': {'a': {'title': 'A', 'type': 'integer'}, 'b': {'title': 'B', 'type': 'integer'}}, 'required': ['a', 'b'], 'title': 'addArguments', 'type': 'object'}, annotations=None)]
INFO:__main__:Starting MCP server with stdio transport...
INFO:__main__:MCP server started successfully
DEBUG:asyncio:Using selector: EpollSelector`


q version was


### Actual behaviour

My tool should get listed

### Steps to reproduce

_No response_

示されている mcp.json 設定と weather.py サーバーログから始め、Windows で stdio のセットアップを再現し、ConfusingCalculator が「Servers still loading.」のままかどうかを確認します。設定された add ツールが利用不可のままではなく、正常に一覧表示されれば完了です。

索引モデルが issue の本文から書いたものです。