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

Annotations already declare readOnlyHint=false, destructiveHint=false, and openWorldHint=true, so the mutation/safety profile is covered. The description adds workflow context ('after a user-approved browser interaction') that is not in the annotations, but it doesn't describe what the call persists, side effects on the submission record, or failure behavior beyond the status hint.

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?

Two tight sentences with the core action front-loaded and the operational hint immediately after. No filler or redundancy.

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?

For a 6-parameter mutation tool with no output schema and 0% schema coverage, the description is thin: it omits the other status values and most parameter meanings. It does supply the key workflow framing and the needs_verification rule, so it is minimally workable but not complete.

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 0% and there are 6 parameters, so the description carries the full burden. It only explains the meaning of the needs_verification enum value; projectId, jobId, message, externalUrl, and externalReference are entirely undocumented in both schema and description.

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?

States a specific verb ('record') and the object ('the result after a user-approved browser interaction'), and the name ties it to backlink submissions. It clarifies the intended verb/resource, though it never explicitly names 'backlink submission' or distinguishes itself from siblings like create_backlink_submission or preflight_backlink_submission.

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?

Gives concrete conditional guidance for one status value ('Use needs_verification for CAPTCHA, MFA, email verification, rate limits, or ambiguous results'), which is genuinely useful. However, it provides no guidance on when to call this tool at all or how it relates to sibling tools such as create_backlink_submission or get_backlink_submission.

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