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

No annotations are provided, so the description must carry the behavioral transparency burden. It discloses the return type (JSON string), the project_key fallback to global tenant_id, and the default for is_enable. However, it does not mention potential side effects such as overwriting an existing configuration or permission requirements.

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 well-structured with a clear summary sentence, parameter list, and return statement. It is appropriately sized with no redundant information.

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?

The description covers all five parameters and the return value. It explains the project_key fallback and default behavior. While it doesn't detail the exact JSON result structure, the presence of an output schema reduces the burden. Minor gaps include potential error cases or prerequisites, but overall it's a complete tool description.

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 schema has 0% description coverage, but the description compensates fully by explaining each parameter: provider with its allowed values ('recaptcha'/'hcaptcha'), site_key and secret_key origins, project_key fallback, and is_enable default. This adds significant meaning beyond the schema's plain names and types.

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 'Save CAPTCHA configuration for Google reCAPTCHA or hCaptcha,' using a specific verb and resource. It differentiates from siblings like 'list_captcha_configs' and 'update_captcha_status' by focusing on the save action.

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 does not explicitly state when to use this tool versus alternatives. It implies usage through the save action, but no exclusions or alternative guidance is given. It provides clear context about creating configs but no direct comparison to sibling tools.

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