Single tool 'add' has critical definition gaps. Tool name lacks action verb (should be 'compute_sum' or 'calculate_addition'). Description is minimal (12 chars, below 20-char threshold). Input parameters 'a' and 'b' have null descriptions, violates pattern:tool-description requiring every parameter to have a non-empty description. No output schema documented. No error handling guidance. Tool is trivial (arithmetic) and not production-grade.

• Rename tool from 'add' to 'compute_sum' or 'calculate_addition' to start with an action verb and clarify intent.
• Expand description to 50 - 150 characters: 'Compute the sum of two integers. Use this for arithmetic calculations. Returns the result as an integer.'
• Add descriptions to parameters: a='First integer operand (required)', b='Second integer operand (required)'.
• Document output schema: 'Returns an integer representing the sum of a and b.'
• Add input validation and error handling: reject non-integer inputs with message 'Invalid input: a and b must be integers. Got a={type(a).__name__}, b={type(b).__name__}.'