Single tool 'add' has a valid schema with typed parameters (a, b as numbers) and basic descriptions. However, the tool description is minimal (10 chars: 'Adds two numbers together'), falling below the 20-char threshold for actionable LLM guidance. Parameter descriptions are present but generic ('First number to add', 'Second number to add'). No output schema is documented. No error handling, recovery guidance, or edge-case documentation. The tool is trivial (arithmetic) and does not demonstrate real-world patterns like pagination, idempotency, or composition. Naming is acceptable (verb_noun: 'add') but the overall definition lacks depth expected for production tools.

• Expand tool description to 50-200 characters. Example: 'Adds two numbers together and returns the sum. Use this for arithmetic operations. Accepts integers and decimals; returns a number.'
• Document the output schema explicitly. Add a 'returns' section: {type: 'object', properties: {result: {type: 'number', description: 'The sum of a and b'}}}.
• Add input validation and error handling. Return structured errors: {error: 'Invalid input', message: 'a and b must be finite numbers', suggestion: 'Ensure both inputs are valid numbers without NaN or Infinity.'}.
• Enhance parameter descriptions with constraints. Change 'First number to add' to 'First number to add (integer or decimal, must be finite; no NaN or Infinity).'
• If this is a demo, add a second tool (e.g., 'multiply', 'divide') to demonstrate tool composition and chaining patterns.