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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safe-read profile is covered. The description adds one useful qualifier — that only public articles are returned — plus the fact that body paragraphs are included, which the annotations do not say. It discloses no auth, rate-limit, or failure behavior beyond that.

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?

One compact sentence with the resource front-loaded and no filler. It is efficient, though it could have spent a clause on the url input.

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 return-value detail is not required. However, for a 1-parameter tool with 0% schema description coverage, the description should specify that the input is the article URL; usage context relative to headlines/news siblings is also absent.

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 coverage is 0% and the only parameter (url) is typed merely as string. The description implies a single article is fetched but never states that url must be a CTV News article URL or what form it takes, so it fails to compensate for the undocumented parameter.

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?

Names a specific resource (one CTV News article) and enumerates the payload (metadata and body paragraphs), which clearly distinguishes it from siblings like ctvnews_headlines, ctvnews_news, and ctvnews_author. It lacks an explicit verb, but the noun-phrase framing makes the operation unambiguous.

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?

No guidance on when to use this tool versus ctvnews_headlines, ctvnews_news, or ctvnews_sections, and no stated prerequisites or input expectations. The agent must infer that this is the detail-fetch for a single article.

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