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 prefixes. No parameter descriptions beyond type hints.

• Expand tool descriptions to 50-200 chars. Example: 'add: Performs addition of two numbers. Use when you need to sum values. Returns the numeric result.' and 'calculate: Performs arithmetic operations (add, subtract, multiply, divide). Use for complex calculations. Returns numeric result or error message.'
• Add parameter descriptions in tool registration. Modify Zod schema or add metadata: 'a: First operand (number)', 'b: Second operand (number)', 'operation: Arithmetic operation to perform (add|subtract|multiply|divide)'.
• Document output schema. Add to tool descriptions: 'Returns: {content: [{type: "text", text: string}]} where text is the numeric result or error message.'
• Improve error messages with recovery hints. Change divide-by-zero to: 'Error: Cannot divide by zero. Try using a non-zero divisor or use the add/subtract/multiply operations instead.'
• Rename tools to verb_noun convention for clarity: 'perform_addition' and 'perform_calculation' or keep short names but add tool annotations (readOnlyHint) to clarify intent.