Two tools with minimal definitions. Both have verb-noun names (add, multiply) and basic integer parameters with type info, but descriptions are extremely short (18-24 chars, well below the 50-200 char baseline for LLM-optimized descriptions). No parameter descriptions provided, only type and name. No output schema documented. No error handling guidance. No composition hints. Tool definitions appear in index.py with @mcp.tool decorators, but parameter descriptions are completely absent, violating the 100% baseline for A+ tools.

• Expand tool descriptions to 50-200 characters. Example: 'add: Adds two integers and returns their sum. Use when you need to perform arithmetic addition. Returns an integer result.'
• Add descriptions to every parameter. Example: 'a: The first integer operand (required)' and 'b: The second integer operand (required)'.
• Document the output schema explicitly. Declare that both tools return an integer, not a structured object.
• Add error handling for edge cases (e.g., integer overflow). Return structured error responses with actionable guidance.
• Remove unused endpoints (subtract, divide) from server.py or expose them as MCP tools for consistency.