gentest

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

The description adds behavioral context beyond the annotations (readOnlyHint, idempotentHint) by clarifying that it is a '指南型工具' (guide-type tool) where 'MCP 不自动生成或运行测试' (MCP does not automatically generate or run tests) and '由 Agent 生成完整测试代码' (the agent generates complete test code). This explains the tool's role as a guide, not a direct executor. No contradiction with annotations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is exceptionally concise: two sentences, front-loaded with the purpose, and every sentence provides essential information. No unnecessary words or repetition.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the 100% schema coverage, no output schema, and no nested objects, the description adequately covers the tool's purpose and behavior. It explains the guide nature and the agent's role. A minor gap is the lack of information about the return value or output, but this is mitigated by the readOnlyHint and the description's clarity.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so the baseline is 3. The tool description does not add any parameter-specific information beyond what the schema already provides. The mention of '注入 code/file_path 与测试清单' is too vague to add meaningful semantics.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool's purpose: '当用户需要为代码生成单元测试时使用' (use when user needs to generate unit tests for code). It specifies the verb (generate), resource (unit tests), and distinguishes from sibling tools like code_review or refactor by being exclusively for test generation.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description explicitly states the usage condition: '当用户需要为代码生成单元测试时使用' (use when user needs to generate unit tests). It provides clear context but does not list when not to use or mention alternatives, which would be beneficial given the large sibling set.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.