MCP server running but tools not injected into conversations (Claude Desktop v1.0.2339) #471
Description
Environment:
unity-mcp: v8.2.3
Claude Desktop: v1.0.2339 (Windows)
Unity Editor with MCP on port 6400
Problem:
MCP server shows "running" in Settings and resources can be added via "Add from unityMCP", but:
Connector toggle is unresponsive (clicking does nothing)
MCP tools are not available in conversations
Config (claude_desktop_config.json):
json{
"mcpServers": {
"unityMCP": {
"command": "C:\WINDOWS\system32\cmd.exe",
"args": [
"/c",
"C:\Users\13412\.local\bin\uvx.exe",
"--from",
"git+https://github.com/CoplayDev/[email protected]#subdirectory=Server",
"mcp-for-unity",
"--transport",
"stdio"
]
}
}
}
**Relevant logs (main.log):**
[warn] UtilityProcess Check: Extension unityMCP not found in installed extensions
[info] desktop_mcp_unexpected_close | metadata: {
extension_name: 'unityMCP'
}
**mcp.log shows successful connection:**
[info] [unityMCP] Server started and connected successfully
[info] [unityMCP] Message from server: {...12 tools, 11 resources...}
Server connects and returns tools, but Claude Desktop doesn't inject them into conversations.