获取注册图形验证码

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

No annotations exist to disclose safety or side effects. The description only states purpose but omits behavioral details such as output format (e.g., image URL, base64), prerequisites, or whether the call is idempotent.

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 a single sentence, which is concise. However, it is too brief and could include additional useful information without becoming unnecessarily long.

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 tool's single parameter and lack of schema descriptions, output schema, or annotations, the description is incomplete. It fails to explain how the captcha image is returned, any prerequisite steps (like obtaining a flowId), or the role in the registration flow.

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?

The only parameter 'flowId' has no description in the schema and is not explained in the tool description. With 0% schema coverage, the description should compensate but does not inform the agent about what value to provide or where to obtain it.

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 it gets a captcha image for real-name registration, which is specific and distinguishes it from the sibling tool 'auth_get_captcha' that serves authentication.

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 implies usage during registration but does not explicitly mention when to avoid using it or provide guidance on choosing between 'register_get_captcha' and 'auth_get_captcha'.

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