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), falling well below the 50-200 char baseline for LLM-optimized descriptions. No output schema documentation. Error handling exists (divide-by-zero check) but lacks recovery guidance. Tool names are action-oriented (add, calculate) but lack verb_noun clarity, 'add' is ambiguous (add to what?), and 'calculate' is generic. No parameter descriptions beyond type hints. No tool annotations (readOnlyHint, idempotentHint). Composition is reasonable (two separate tools), but descriptions do not explain when to use each or what they return.

• Expand tool descriptions to 50-200 chars. Example for 'add': 'Adds two numbers and returns the sum. Use this for simple addition; use calculate() for subtract, multiply, or divide operations.'
• Add parameter descriptions. For 'operation': 'The arithmetic operation to perform. Must be one of: add, subtract, multiply, divide. Note: divide by zero returns an error.'
• Document output schema in tool description. Example: 'Returns a text response containing the numeric result or an error message.'
• Rename 'calculate' to 'perform_arithmetic' to follow verb_noun naming and reduce ambiguity.
• Enhance divide-by-zero error to include recovery: 'Cannot divide by zero. Ensure the second operand (b) is non-zero, or use add/subtract/multiply instead.'