Single tool with minimal definition quality. Tool name 'hello_world' lacks action verb (should be 'greet_user' or similar). Description is trivial (3 words, well below 10-char minimum for meaningful context). Parameter 'name' has no description despite being required for LLM understanding. No output schema documented. No error handling guidance. Fails baseline expectations for production-grade tools.

• Rename tool to 'greet_user' or 'generate_greeting' to start with an action verb that signals intent to LLMs.
• Expand description to 50-150 chars: 'Generate a personalized greeting message for a given name. Returns a friendly greeting string. Use when you need to create a custom salutation.'
• Add parameter description for 'name': 'The person's name to include in the greeting (1-100 characters, alphanumeric and spaces).'
• Document output schema: 'Returns a string containing the greeting message, e.g., "Hello, Alice!"'
• Add input validation: reject empty names, names >100 chars, and return clear error: 'Invalid name: must be 1-100 characters. Got: "<value>"'

Inferred effective spec: 2026-07-28+.

• Relies on Logging (deprecated) - log to stderr or use OpenTelemetry