Single tool 'add' has critical definition gaps. Tool name lacks action verb (should be 'add_numbers' or similar for clarity). Description is minimal (11 chars, below 20-char threshold). Input parameters 'a' and 'b' have null descriptions, violates requirement that every parameter must have a non-empty description. No output schema documented. No error handling guidance. Tool is trivial (arithmetic) but definition quality is poor by production standards.

• Add non-empty descriptions to parameters 'a' and 'b'. Example: 'a: The first integer to add (range: -2^31 to 2^31-1)' and 'b: The second integer to add (range: -2^31 to 2^31-1)'.
• Expand tool description to 50-200 chars. Example: 'Add two integers and return their sum. Use this for arithmetic operations. Returns an integer result. Handles overflow by raising an error.'
• Document output schema. Example: 'Returns: integer (the sum of a and b, or error if overflow)'.
• Rename tool from 'add' to 'add_numbers' to follow verb_noun convention and improve LLM clarity.
• Add error handling: validate inputs are integers, catch overflow, return actionable error like 'Invalid input: a and b must be integers within range [-2^31, 2^31-1]'.