generate_image

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

没有注解，描述承担了行为披露的全部责任。描述说明了请求会被串行处理、等待页面完成报告、没有20秒超时限制，这些是有用的行为细节，让代理了解执行模型。但未涉及权限、副作用或错误处理等，考虑到无注解，整体披露较充分。

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?

描述简洁，两个句子传达了核心功能和行为特征，没有冗余信息。第二句补充了重要的执行细节（串行处理、无固定超时），结构合理，但可再稍微结构化一点。

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?

工具接受2个参数，无输出schema，描述提供了行为的额外细节（串行处理、异步等待）。但对于兄弟工具（get_task_status、download_image）的关系没有提及，缺少集成上下文的说明。考虑到相对简单，描述基本够用，但可以更全面。

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覆盖率为0%，描述仅提到了'注入本地参考图'对应reference_images参数，但核心参数prompt没有额外解释，仅从字段名推断其含义。描述未能完全补偿schema参数的缺乏，特别是prompt的格式、要求或约束未提及。

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?

描述明确说明了工具的动作是生成图片，资源是GPT Image Playground页面，并提到可注入本地参考图。与兄弟工具get_task_status和download_image在功能上明显区分，目的清晰具体。

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?

描述暗示了使用场景（需要通过已打开的页面生成图片），但没有明确说明何时应使用此工具而非其他兄弟工具，也未提及限制条件（如页面必须已打开、注入参考图的步骤等）。缺少明确的'何时使用/何时不使用'指导。

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