Two tools with basic schemas and minimal descriptions. Both tools have proper input schemas with typed parameters and enums (calculate tool), but descriptions are extremely short (10-40 chars, well below the 50-200 char baseline for LLM-optimized descriptions). No output schema documentation. Error handling is minimal (divide-by-zero check in calculate tool only). Tool names lack action verbs ('add' and 'calculate' are weak; 'perform_addition' and 'perform_calculation' would be clearer). No parameter descriptions beyond type info. No composition guidance or chaining support.

• Expand tool descriptions to 80-150 chars. Example for 'add': 'Adds two numbers and returns their sum. Use when you need basic arithmetic addition. Returns a single numeric result.'
• Add parameter descriptions in schema. For 'a' and 'b': 'First operand (numeric value)' and 'Second operand (numeric value)'. For 'operation': 'Arithmetic operation to perform: add (sum), subtract (difference), multiply (product), or divide (quotient).'
• Document output schema explicitly. E.g., 'Returns: {result: number}, the numeric result of the operation.'
• Rename tools to action verbs: 'add' → 'add_numbers', 'calculate' → 'perform_arithmetic'. This helps LLMs parse intent from the name alone.
• Enhance error handling with recovery guidance. For divide-by-zero: 'Cannot divide by zero. Check your inputs and retry with a non-zero divisor, or use a different operation.'