Single tool 'echo' with minimal definition. Description is trivial (16 chars, below 20-char threshold). No output schema documented. Tool does not follow verb_noun naming (should be 'echo_message'). No error handling guidance. Fails multiple hard scoring rules: description under 20 chars, parameters lack descriptions, no output schema visible.

• Expand tool description to 50 - 200 chars. Example: 'Echo back the input message. Useful for testing connectivity and message formatting. Returns the exact input string.'
• Add parameter description for 'message': 'The text string to echo back. Accepts plain text up to 10,000 characters. No special formatting required.'
• Document output schema explicitly. Example: {"type": "object", "properties": {"echoed_message": {"type": "string", "description": "The input message returned unchanged"}}}
• Rename tool to 'echo_message' to follow verb_noun convention and improve LLM intent parsing.
• Add error handling: return structured errors like 'Message exceeds 10,000 character limit' instead of generic failures, enabling LLM self-correction.

Inferred effective spec: <=2025-11-25.

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