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. Error handling is minimal (divide-by-zero check in 'calculate' only). Tool names are action-oriented but descriptions don't explain WHEN to use each tool or distinguish between 'add' (simple) vs 'calculate' (multi-operation). No parameter descriptions beyond type hints in schema. Composition is reasonable (two separate tools), but lacks production-grade polish.

• Expand tool descriptions to 50-150 chars. Example for 'add': 'Adds two numbers and returns the sum. Use this for simple arithmetic; use calculate() for subtract, multiply, or divide operations.'
• Add parameter descriptions in schema. For 'a' and 'b': 'First operand (numeric value)' and 'Second operand (numeric value)'. For 'operation': 'Arithmetic operation: add, subtract, multiply, or divide.'
• Document output schema explicitly. E.g., 'Returns {result: number} or {error: string} on divide-by-zero.'
• Add input validation and actionable error messages. E.g., 'Cannot divide by zero. Try a non-zero divisor or use add/subtract/multiply instead.'
• Consider renaming 'add' to 'add_numbers' and 'calculate' to 'calculate_arithmetic' for clarity, or merge into a single 'calculate' tool with operation enum.