Two tools with minimal quality. Both 'add' and 'subtract' have bare-minimum descriptions (under 50 chars) and parameter descriptions are completely missing (null). Input schemas exist but lack parameter documentation. No error handling, no output schema documentation, and no guidance on when to use each tool. The resource and prompt features are present but not evaluated as tools. This server falls well below production baseline.

• Add non-empty descriptions to all parameters. Example: 'a: The first integer operand (any valid 32-bit integer)' and 'b: The second integer operand (any valid 32-bit integer)'.
• Expand tool descriptions to 100-200 characters. Example for add: 'Adds two integers and returns their sum. Use this for arithmetic operations. Returns an integer result. Supports any valid 32-bit integers.'
• Document the output schema explicitly. Example: 'Returns: integer (the sum of a and b)' or 'Returns: {"result": integer}'.
• Add input validation and error handling. Return structured errors like '{"error": "Invalid input", "message": "Parameter a must be an integer, got: <value>"}' with guidance on valid ranges.
• Distinguish the two tools more clearly in descriptions. Currently both are generic arithmetic operations, clarify when to use add vs subtract, or consider combining into a single 'calculate' tool with an operation parameter.