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 is minimal (divide-by-zero check in calculate tool only). Tool names are action-oriented (add, calculate) but descriptions don't explain WHEN to use each tool or their differences. No parameter descriptions beyond type hints in schema. Lacks guidance on tool composition or error recovery.

• Expand tool descriptions to 50-150 chars. Example: 'add: Performs simple addition of two numbers. Use when you need a quick sum of exactly two values. Returns the numeric result.' and 'calculate: Performs arithmetic operations (add, subtract, multiply, divide) on two numbers. Use for complex calculations or when operation type is dynamic. Returns numeric result or error message.'
• Add parameter descriptions to both tools. Example for add: 'a: First number to add (any real number)', 'b: Second number to add (any real number)'. For calculate: 'operation: Arithmetic operation to perform (add, subtract, multiply, or divide)', 'a: First operand (any real number)', 'b: Second operand (any real number)'
• Document output schema explicitly. Example: 'Returns object with content array containing text field with numeric result as string. On error (divide by zero), returns error message in text field.'
• Improve error handling in calculate tool. Return structured error response with error code and recovery guidance: '{"error": "DIVISION_BY_ZERO", "message": "Cannot divide by zero. Ensure divisor (b parameter) is non-zero.", "retryable": false}'
• Add tool selection guidance in descriptions. Clarify: 'Use add for simple two-number addition. Use calculate for multiple operation types or when operation is determined at runtime.'