Two tools with basic schemas and minimal descriptions. Both tools have input schemas with proper types (number, enum), but descriptions are extremely short (10-50 chars) and lack context for LLM selection. No output schema documentation. Error handling present (divide-by-zero check) but not generalized. Tool names are action-oriented (add, calculate) but lack verb prefixes. No parameter descriptions beyond type hints in schema. Composition is reasonable (two distinct operations), but descriptions do not explain WHEN to use each tool or what distinguishes them.

• Expand tool descriptions to 50-200 chars. Example: 'add: Performs simple addition of two numbers. Use when you need to sum two values. Returns the numeric result.' and 'calculate: Performs arithmetic operations (add, subtract, multiply, divide). Use for complex calculations. Supports division-by-zero error handling.'
• Add parameter descriptions in Zod schema or via tool metadata. Example: 'a: First operand (number)', 'b: Second operand (number)', 'operation: Arithmetic operation to perform (add|subtract|multiply|divide)'.
• Document output schema. Example: 'Returns: {type: "text", content: string} where content is the numeric result as a string.'
• Rename tools with stronger verbs: 'perform_addition' or 'compute_sum' instead of 'add'; 'perform_arithmetic' or 'compute_expression' instead of 'calculate'.
• Enhance error handling for calculate: return structured error responses with actionable guidance. Example: 'Invalid operation: got "modulo", must be one of: add, subtract, multiply, divide.'