Single tool 'add' has critical definition gaps. Tool name lacks action verb clarity (should be 'sum_numbers' or 'calculate_sum'). Description is trivial (8 words, well below 20-char minimum). Parameters 'a' and 'b' have minimal descriptions ('First number to add', 'Second number to add') that lack context on valid ranges, formats, or use cases. No output schema documented. Tool is READ_ONLY but description does not explain what it returns or when to use it. No error handling guidance. This is a demo/stub tool, not production-grade.

• Rename tool from 'add' to 'sum_numbers' or 'calculate_sum' to start with action verb and clarify intent.
• Expand description to 50-150 characters: 'Adds two numbers together and returns their sum. Use for arithmetic calculations. Returns a single numeric result.'
• Add numeric constraints to parameters: 'a' and 'b' should specify min/max (e.g., 'number between -1e10 and 1e10') or precision limits.
• Document output schema explicitly: 'Returns object with field result (number) containing the sum of a and b.'
• Add error handling: 'If inputs are not numbers, returns error with message indicating expected type. Retry with valid numeric inputs.'