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_noun clarity, 'calculate' is generic and ambiguous about which operations it supports without reading the schema.

• Expand tool descriptions to 50-150 chars. Example for 'add': 'Adds two numbers and returns the sum. Use this for simple two-operand addition. For multiple operations (subtract, multiply, divide), use calculate() instead.'
• Document output schema explicitly. Both tools return {type: 'text', text: string}. Clarify that the text field contains the numeric result as a string.
• Add parameter descriptions with constraints. Example: 'a: First number (integer or decimal, range -1e10 to 1e10)' and 'b: Second number (same constraints)'.
• Enhance error messages with recovery guidance. For divide-by-zero: 'Cannot divide by zero. Ensure the second operand (b) is non-zero, or use add/subtract/multiply instead.'
• Rename 'calculate' to 'calculate_arithmetic' or split into separate tools (add_numbers, subtract_numbers, multiply_numbers, divide_numbers) to reduce ambiguity and follow verb_noun naming.