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• Expand all tool descriptions to 50-200 characters. Include WHAT the tool does, WHEN to use it vs similar tools, and what it returns. E.g., 'Add two floating-point numbers. Use this for arithmetic operations; returns a single numeric result. Supports negative numbers and decimals.'
• Document output schemas for all tools. For add/subtract/multiply/divide, specify 'Returns: number (float)'. For echo/reverse/uppercase/lowercase, specify 'Returns: string'. For count_words, specify 'Returns: object with {word_count: integer, total_characters: integer}'.
• Enhance parameter descriptions with format and range constraints. E.g., 'First number (float, range: -1e6 to 1e6): The left operand for the arithmetic operation.'
• Add error handling documentation for divide. Specify: 'Error if b == 0: Division by zero. Message: "Cannot divide by zero." Recovery: Ensure denominator is non-zero before calling.'
• Rename uppercase and lowercase to use verb_noun pattern: convert_to_uppercase, convert_to_lowercase.
• Document whether tools are idempotent (calling twice with same input produces same output). Echo, reverse, uppercase, lowercase, count_words are idempotent; add/subtract/multiply/divide are idempotent. State this for agent planning.
• Consider grouping simple arithmetic tools into a single compose_calculation tool that accepts an operation enum (add, subtract, multiply, divide) and two operands, with a single unified error response for division by zero and invalid operations.