Two tools present with basic schemas and descriptions, but significant gaps in parameter documentation and output schema clarity. add_numbers has better parameter descriptions ('first number', 'second number') vs add which lacks any parameter descriptions. Neither tool documents output schema or return structure. Both descriptions are minimal (10-20 chars) and lack context on when to use each tool. No error handling guidance, no idempotency hints, and duplicate functionality (two addition tools) signals poor composition.

• Consolidate add_numbers and add into a single tool with a clear verb_noun name like 'add_numbers'. Remove the duplicate.
• Expand add tool description to 50-150 chars explaining what it does, when to use it, and what it returns. Example: 'Add two numbers and return the sum. Use for arithmetic operations. Returns {result: number}.'
• Add parameter descriptions to add tool: 'a: The first number to add (numeric value)' and 'b: The second number to add (numeric value)'.
• Document output schemas explicitly in tool definitions. Declare that both tools return {result: number} with a 'result' field containing the numeric sum.
• Add input validation and error handling: reject non-numeric inputs with a clear message like 'Invalid input: a and b must be numbers. Got a={type(a)}, b={type(b)}'.