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 tools). Parameter descriptions are present but terse. No output schema documentation. Error handling exists (divide-by-zero check) but lacks recovery guidance. Tools follow verb_noun naming but lack context about when to use each vs the other.

• Expand tool descriptions to 50-200 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 the calculate tool instead.'
• Document output schema explicitly. Specify that both tools return {content: [{type: 'text', text: string}]} and clarify whether text is always a number string or can be an error message.
• Consolidate 'add' and 'calculate' into a single 'calculate' tool, or clearly document that 'add' is a convenience wrapper for the common case and 'calculate' is for advanced operations.
• Add numeric constraints to parameter descriptions. Example: 'a: A number (integer or float, no NaN or Infinity). For division, b must not be zero.'
• Enhance error messages with recovery hints. Example: 'Cannot divide by zero. Try using different operands, or use the add/subtract/multiply operations instead.'