Mcp Compliance

You'd reach for this when building or maintaining an MCP server and need to verify it actually follows the spec correctly. It works as both a standalone CLI tool for testing during development and as an MCP server itself, which is a neat meta approach. Run it against your server implementation to catch compliance issues before they become integration problems. Especially useful if you're publishing a server publicly or need to validate that spec changes haven't broken your implementation. The dual mode means you can automate checks in CI or test interactively.