Two tools with minimal descriptions and basic schemas. 'add' (9 chars) and 'calculate' (10 chars) descriptions are far below the 50-200 char baseline for LLM-optimized tools. Both tools lack parameter descriptions entirely, critical gap per pattern:tool-description. Schemas are present but sparse. No error handling guidance, no output schema documentation, no composition hints. Tools are simple arithmetic operations with no state-modifying risks documented.

• Expand 'add' description to ~100 chars: 'Adds two numbers together. Use this for simple addition operations. Returns the numeric sum as a text response.'
• Expand 'calculate' description to ~150 chars: 'Performs arithmetic operations (add, subtract, multiply, divide) on two numbers. Specify the operation via the operation enum. Returns the result as text. Division by zero returns an error.'
• Add parameter descriptions: a='First operand (number)', b='Second operand (number)', operation='Arithmetic operation to perform: add, subtract, multiply, or divide'
• Document output schema: 'Returns {content: [{type: "text", text: string}]} where text is the numeric result or error message.'
• Rename tools to verb_noun pattern: 'perform_addition' and 'perform_arithmetic' for clarity and LLM discoverability.