Single tool 'add' has a valid schema with typed parameters (integers) but critical gaps in descriptions. Parameter descriptions are null/missing entirely, violating the baseline that 100% of A+ tools have parameter descriptions. Tool description is minimal (18 chars, below the 34-char p10 baseline). No output schema documented. No error handling guidance. No composition with other tools. The server also exposes prompts and resources but the evaluation focuses on the single tool.

• Add non-empty descriptions to both parameters 'a' and 'b'. Example: 'a: The first integer to add (range: -2147483648 to 2147483647)' and 'b: The second integer to add (range: -2147483648 to 2147483647)'.
• Expand tool description to 50-100 characters with context. Example: 'Add two integers and return their sum. Use this for basic arithmetic operations. Returns an integer result.'
• Document the output schema explicitly. Example: 'Returns: integer (the sum of a and b, range: -2147483648 to 2147483647)'.
• Add error handling for overflow/invalid inputs. Return structured errors like 'Invalid input: a must be an integer between -2147483648 and 2147483647' instead of stack traces.
• Consider renaming to 'add_numbers' or 'add_integers' to follow verb_noun convention and improve clarity for LLM tool selection.