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

Annotations already declare openWorldHint=true, idempotentHint=true and destructiveHint=false; the description usefully adds that the tool fetches the product's external page and inspects both link presence and its dofollow attribute. It does not say what happens when the page is unreachable, the badge is missing, or the fetch is blocked, and readOnlyHint=false is left unexplained even though the description frames this purely as a check.

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 short sentences: the first leads with the action and scope, the second is a pure timing instruction. The parenthetical about the free plan is slightly wordy but carries real intent, and nothing is buried at the end.

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 three-parameter, one-required check tool with no output schema, the definition conveys what is inspected and when to run it. The main omission is the shape of the result (link found vs. missing, dofollow vs. nofollow, fetch failure), which an agent would need to interpret the response.

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%, and the schema already documents that product defaults to the last worked-on product and page_url defaults to the product's website. The description adds no syntax, slug format, or override guidance beyond that, so baseline 3 applies.

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 and resource: opens the product's page, checks for a link back to the directory, and reports whether it is dofollow. The scope is concrete and distinguishable from record_submission/plan_submissions, but it never mentions the sibling verify_link, which by name sounds like it could overlap, so sibling differentiation is incomplete.

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?

"Call it after the user deploys, before pressing the directory's verify button" gives an explicit sequencing cue that an agent can act on. It stops short of naming alternatives or exclusions (e.g., when to use verify_link instead), so it is clear context without full routing.

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