mcp_calculator

The server demonstrates strong security practices for its scope: it uses Pydantic for robust inbound message validation, handles errors gracefully by returning structured error messages without exposing internal details, and explicitly catches division-by-zero errors. No 'eval' or similar dangerous functions are used. There are no hardcoded secrets, and dependencies are standard. The server primarily performs arithmetic, limiting the attack surface. A basic HTML demo page is exposed on `/demo`, which might typically be removed in a production environment, but is benign in this context.