Two tools with basic schemas and minimal descriptions. Both tools have input schemas with proper types (number, 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 lack action verbs ('add', 'calculate' are weak; 'perform_addition', 'execute_calculation' would be clearer). Parameters have types but descriptions are terse. No guidance on when to use one tool vs. the other.

• Expand tool descriptions to 50-150 chars. Example: 'Adds two numbers and returns the sum. Use this for simple addition; use calculate() for subtract, multiply, or divide operations.'
• Rename tools with action verbs: 'add' → 'perform_addition', 'calculate' → 'execute_arithmetic'. This matches baseline production naming (90% of A+ tools start with verbs).
• Document output schema explicitly. Add to tool docstring: 'Returns: {result: number, operation: string (for calculate only)}'.
• Add parameter constraints to descriptions. Example: 'a: First number (integer or decimal, range -1e10 to 1e10)' instead of just 'First number to add'.
• Consider removing 'add' tool if 'calculate' with operation='add' is sufficient. Redundant tools increase LLM confusion. If both exist, explain the distinction clearly.