Two tools with basic schemas and minimal descriptions. Both tools have input schemas with proper types (number, string enum), but descriptions are extremely short (10-40 chars) and lack context for LLM selection. No output schema documentation. Error handling present only for divide-by-zero in 'calculate'. Tool names lack action verbs (should be 'perform_addition', 'perform_calculation'). Parameters have types but descriptions are sparse. No guidance on when to use one tool vs. the other.

• Expand tool descriptions to 50-150 chars. Example: 'add: Adds two numbers and returns the sum. Use this for simple two-number addition. Returns a single numeric result.' 'calculate: Performs arithmetic operations (add, subtract, multiply, divide) on two operands. Use when you need operations beyond addition. Returns numeric result or error message.'
• Rename tools with action verbs: 'add' → 'perform_addition' or 'add_numbers'; 'calculate' → 'perform_calculation' or 'execute_arithmetic'.
• Document parameter constraints in descriptions. Example: 'a: First number (any real number, no range limit)' and 'operation: The arithmetic operation to perform. Must be one of: add, subtract, multiply, divide.'
• Add output schema documentation in tool descriptions. Example: 'Returns: {"content": [{"type": "text", "text": "<numeric result or error message>"}]}'
• Add error recovery guidance. For divide-by-zero, return 'Error: Cannot divide by zero. Verify the second operand is non-zero and retry.' instead of a bare error message.