Two tools with minimal descriptions and basic schemas. 'add' (9 chars) and 'calculate' (10 chars) descriptions are far below the 50-200 char baseline for LLM-optimized tools. Both tools lack output schema documentation. Parameter descriptions are present but generic. No error handling guidance, no recovery paths, no idempotency hints. Tools are simple arithmetic operations with READ_ONLY risk classification, but lack the depth expected of production tools.

• Expand 'add' description to: 'Add two numbers together. Use this for simple two-operand addition. Returns the numeric sum.' (≈80 chars, meets baseline).
• Expand 'calculate' description to: 'Perform arithmetic operations (add, subtract, multiply, divide) on two numbers. Specify the operation and operands. Returns the numeric result or error message for division by zero.' (≈160 chars).
• Document output schema explicitly: both tools return {result: number} or {error: string}. Add this to tool descriptions or create a separate schema reference.
• Add error classification to 'calculate': 'Division by zero returns a user-fixable error. Retry with non-zero divisor.' This guides LLM recovery.
• Remove 'add' tool or merge into 'calculate' to eliminate redundancy. If keeping both, clarify in descriptions when to use each (e.g., 'add' for simple cases, 'calculate' for complex operations).