The server defines 1 tool (add) with basic but incomplete quality. The tool has a clear action verb name ('add'), a functional description, and visible parameter schemas with types and descriptions. However, the descriptions are minimal (10-20 chars per param, 31 chars for tool), output schema is not documented, and there is no error handling, input validation, or recovery guidance. The server also exposes 1 resource and 1 prompt, but these are not tools and fall outside the tool evaluation scope. The tool definitions are directly visible in server.py via @mcp.tool() decorator, so no inference penalty applies. Overall quality is fair but below production grade.

• Expand tool description to 50-150 chars: 'Add two integers and return their sum. Use for arithmetic calculations. Returns the numeric sum of inputs.'
• Expand parameter descriptions: 'a: An integer to add (range: -1000000 to 1000000). b: An integer to add (range: -1000000 to 1000000).'
• Document the output schema in the docstring or tool metadata: 'Returns: int, the sum of a and b.'
• Add input validation inside the tool to enforce integer constraints and return structured error responses: 'Invalid a: expected integer, got <type>.'
• Consider adding min/max constraints to parameter schemas if using a schema generator that supports JSON Schema keywords (minimum, maximum).