Single tool 'add' has critical definition gaps. Schema is present with proper types (number) but lacks context. Output schema not documented. Tool naming is generic and does not follow verb_noun pattern (should be 'compute_sum' or 'add_numbers'). No error handling guidance. Fails 6 of 7 critical checks in Definition Quality rubric.

• Add a tool description (50-200 chars): 'Adds two numbers together and returns the sum. Use this for arithmetic operations.'
• Add descriptions to parameters 'a' and 'b': 'First number to add (numeric value)' and 'Second number to add (numeric value)'
• Rename tool from 'add' to 'compute_sum' or 'add_numbers' to follow verb_noun convention and improve LLM discoverability
• Document output schema in code comments or JSDoc: returns {content: [{type: 'text', text: string}]} where text is the numeric sum
• Add input validation and return structured error messages: 'Invalid input: a and b must be numbers. Got a={typeof a}, b={typeof b}'