mcpsnoop: Wireshark for MCP — Debug AI Agent Tool Calls
So you spend an hour wiring up an MCP server. Your Claude Code client connects fine — no errors. But when you ask it to use a tool, nothing happens. Or worse, it calls the tool with arguments that look weird, and you have no idea why. That’s the blind spot. The MCP Inspector is a standalone test client — it can’t see what your real client is actually sending. You’re debugging in the dark. ...