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

With no annotations, the description carries the full burden and does well: it discloses that the last verdict wins, that the verdict applies retroactively to every find of the same video on that tab, cross-run persistence, the response shape, that it is free, and the 404 find_not_found error. Auth/permission behavior tied to api_key is not addressed, but overall behavioral disclosure is strong.

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 core action and default are front-loaded, which is good. But the sentence 'The verdict is the video's on that tab: every find of the same video you have there carries it...' is convoluted and repetitive, and the response/endpoint/error tail reads as an unstructured dump rather than efficient prose.

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?

An output schema exists, so explaining return values is optional (the description does it anyway), and the error case plus the cross-run persistence model are covered. It is nearly complete for a 3-parameter mutation, with the only real gap being auth/permission prerequisites for api_key.

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 the description compensates meaningfully for verdict by enumerating the two accepted values ('keep' default, 'reject'), which the schema lacks even as an enum. find_id is implicitly clear, but api_key is documented nowhere, leaving one of three parameters unexplained.

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 gives a specific verb+resource ('Keep or reject a find') and even defines what a find is ('a long-form hook or a package'), disambiguating it from some siblings. It stops short of explicitly differentiating from close siblings like keep_hook or clear_find_decision, so it is clear but not fully routed.

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?

It explains the verdict semantics (default 'keep', 'last verdict wins') and mentions list_kept_finds as the downstream consumer, which implies when to use it. However, it never states when to use this versus clear_find_decision or keep_hook, leaving the alternative-selection decision to inference.

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