Two tools with minimal descriptions and incomplete parameter documentation. 'randomNumber' has a 19-char description (below 20-char threshold); 'add' has a 22-char description. Neither tool description explains WHEN to use it or what it returns. Parameter descriptions are present but sparse. No output schemas documented. No error handling guidance. No tool annotations (readOnlyHint). Schemas are present and properly typed via Zod, but descriptions lack the depth needed for LLM selection and reasoning.

• Expand 'randomNumber' description to 80 - 150 chars: 'Generate a random integer between 1 and max (inclusive). Use this to create test data, pick random items, or simulate chance events. Returns a single number as text.'
• Expand 'add' description: 'Add two numbers and return their sum. Use this for arithmetic calculations or numeric transformations. Returns the result as text.'
• Document output schemas explicitly. E.g., randomNumber returns {type: 'text', text: '<number>'} where <number> is an integer string. Add this to tool docstrings or a separate schema registry.
• Add readOnlyHint: true to both tool schemas to signal they have no side effects and are safe to retry.
• Clarify parameter 'max' in randomNumber: 'Maximum value (inclusive) for the random number. Must be 1 - 100. Returns one random integer in range [1, max].' Add validation error: 'max must be 1 - 100, got {value}'.