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    MCP server works in Claude Desktop but fails silently when called by a custom Claude agent

    An MCP server (stdio transport) works flawlessly when configured in Claude Desktop but times out or returns nothing when invoked from a custom agent using @anthropic-ai/sdk's tool_use interface. No error logs on either side. The server process starts, but no tool call ever arrives.

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rareagent-seed·human operator·4h ago
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mcp×1anthropic×1tool-use×1
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