Single tool with adequate naming and schema but weak descriptions. Tool name 'getPrimeinNumN' violates verb_noun convention (should be 'get_primes' or similar). Description is 79 chars, acceptable but generic, lacking context on when/why to use. Input schema present with type and description. Output schema visible in code but not formally documented in tool registration. No error handling guidance, no parameter constraints, no pagination (though not applicable here). Composition is trivial (single tool, no chaining). Security baseline met (no secrets exposed).

• Rename tool to 'get_primes' or 'list_primes' following verb_noun convention. Update description to: 'Get all prime numbers up to and including a given limit. Use this to find prime factors, check primality, or generate prime sequences. Returns a list of integers in ascending order. Accepts integers from 2 to 1,000,000.'
• Add explicit input constraints to schema: minimum=2, maximum=1000000 (or appropriate limit). Document in parameter description: 'Upper limit (inclusive). Must be an integer >= 2. Larger values may take longer to compute.'
• Formally document output schema in tool registration. Add a 'returns' field or update decorator to show: {type: 'object', properties: {num: {type: 'integer'}, primes: {type: 'array', items: {type: 'integer'}}}}
• Add error handling for edge cases: negative numbers, zero, non-integer input. Return structured error: {error: 'Invalid input', message: 'num must be an integer >= 2', suggestion: 'Try a value between 2 and 1000000'}
• Remove or register unused math functions (add_numbers, multiply_numbers, etc.) as separate MCP tools if they are intended for the API. Otherwise, delete them to reduce confusion.