Single tool 'add' has a valid schema with typed parameters (a, b as numbers) and descriptions for each parameter. However, the tool description is extremely minimal (11 characters: 'Adds two numbers together'), falling well below the 34-character baseline for p10 and the recommended 50-200 character range for LLM-optimized descriptions. The description lacks context on WHEN to use this tool, what it returns, or any prerequisites. No output schema is documented. The tool is trivial (arithmetic) and does not reflect real-world agent patterns. No error handling, no composition guidance, no security considerations. This is a demo/stub implementation, not production-grade.

• Expand tool description to 50-200 characters. Example: 'Adds two numbers together and returns the sum. Use this for arithmetic calculations. Returns a single numeric result.'
• Document the output schema explicitly. Specify that the response is a text field containing the numeric sum.
• Rename tool from 'add' to 'add_numbers' to follow verb_noun convention and improve LLM discoverability.
• Add input validation and error handling. Return structured errors like 'Invalid input: a and b must be numbers. Got a=<value>, b=<value>.'
• Replace this stub with a real-world tool (e.g., create_task, send_message, search_documents) that demonstrates proper composition, error handling, and security patterns.