Single tool 'sayHello' has a basic description and visible input schema, but falls short of production quality. Description is 87 chars (within 10-1024 range but minimal for LLM selection). Input schema present with type and description for 'name' parameter. No output schema documented. No error handling guidance. Tool name lacks action verb clarity (should be 'greet_user' or 'send_greeting'). No parameter constraints, validation rules, or recovery guidance. Composition is trivial (single greeting tool). Missing idempotency hints, rate-limit guidance, and structured output documentation.

• Rename tool to 'greet_user' or 'send_greeting' to start with an action verb and clarify intent.
• Expand description to 150-250 chars: explain what the tool does, when to use it (e.g., 'Use to generate a personalized greeting message'), and what it returns (e.g., 'Returns a string greeting').
• Document output schema explicitly: { type: 'string', description: 'A personalized greeting message' }.
• Add parameter constraints: name should have minLength: 1, maxLength: 100, and pattern to reject special characters if needed.
• Add error handling: document behavior for empty/null name, and return actionable error messages (e.g., 'Name cannot be empty. Provide a person's name to greet.').