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Single tool 'echo' with minimal definition quality. Tool has a valid input schema with proper JSON Schema structure (type, properties, required fields), but description is only 95 characters and lacks actionable context for LLM selection. No output schema documented. No error handling guidance. Parameter 'message' has a description (72 chars), meeting baseline, but tool lacks context on when/why to use it vs alternatives. No tool annotations (readOnlyHint, destructiveHint, idempotentHint). Naming is acceptable (verb-noun 'echo'), but the tool is trivial and provides minimal value for agent composition.
输入什么就返回什么的echo工具。可以用来测试MCP连接或简单地回显文本。
No output schema documented. LLMs cannot infer what fields or structure the response contains, limiting downstream tool chaining and data extraction.
Tool description lacks actionable context. Does not explain WHEN to use echo vs other tools, what prerequisites exist, or what the return value represents. At 95 chars, it is below the 194-char baseline for production tools.
No error handling guidance. Tool does not document what happens on invalid input, empty messages, or edge cases. LLM has no recovery path if the tool fails.
No tool annotations. Tool lacks readOnlyHint, destructiveHint, or idempotentHint metadata. LLM cannot determine if the tool is safe to retry or has side effects.
Inferred effective spec: <=2025-11-25.
| Scored | Grade | Overall | Spec posture | Rubric |
|---|---|---|---|---|
| 2026-09-23 | D | 52 | <=2025-11-25 | v2 |
Tool is trivial and provides minimal value for agent composition. A single echo tool does not enable multi-step workflows or meaningful tool chaining.