Two tools with basic schemas and minimal descriptions. Both tools have input schemas with proper types (number, string, enum), but descriptions are extremely short (10-50 chars) and lack context for LLM selection. No output schema documentation. No error handling guidance beyond a single divide-by-zero check. Tool names are verb-noun but generic ('add', 'calculate'). Parameters lack detailed constraints or format guidance. No idempotency hints, no recovery guidance, no composition support.

• Expand tool descriptions to 100-200 chars. Example for 'add': 'Adds two numbers and returns the sum. Use this for simple two-operand addition. For multiple operations (subtract, multiply, divide), use calculate() instead.'
• Document output schema explicitly. Example: 'Returns {result: number} where result is the arithmetic sum of a and b.'
• Add parameter descriptions with constraints. Example for 'a': 'First operand (number). Must be finite; NaN and Infinity are rejected.'
• Enhance error handling: validate inputs (finite numbers, no NaN/Infinity), return structured error responses with recovery hints. Example: 'Invalid operand: got NaN. Ensure both a and b are valid numbers.'
• Rename 'add' to 'add_numbers' and 'calculate' to 'calculate_arithmetic' for clarity and to follow verb_noun convention.