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 in 'calculate' (divide-by-zero) but not generalized. Tool names are action verbs but lack specificity, 'add' and 'calculate' don't clearly distinguish when to use each. No parameter descriptions beyond type hints. Schemas are visible and properly typed, preventing a lower score, but definition quality is well below production baseline.

• Expand tool descriptions to 50-150 chars. Example: 'add' → 'Add two numbers and return the sum. Accepts integers and decimals. Use when you need basic arithmetic addition.'
• Add parameter descriptions in schema. Example: 'a': {type: 'number', description: 'First operand (integer or decimal, no bounds)'}
• Document output schema explicitly. Example: {type: 'object', properties: {result: {type: 'number', description: 'The arithmetic result'}}}
• Consolidate 'add' and 'calculate' into a single 'calculate' tool with operation enum, or rename 'add' to 'add_numbers' and 'calculate' to 'perform_arithmetic' to reduce ambiguity.
• Enhance error messages with recovery guidance. Example: 'Cannot divide by zero. Provide a non-zero divisor (b ≠ 0).'