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

Annotations already establish that this is a safe read operation (readOnlyHint=true, destructiveHint=false). The description adds useful output-scope context by saying the article is returned 'in full' and includes related-commentary links, but it does not disclose additional behaviors such as error cases, response shape, or pagination.

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 a single, tightly written sentence that conveys the core action and a distinguishing detail. There is no redundancy or filler, and the most important information is front-loaded.

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 simple get-by-ID operation with one parameter and no output schema, the description is largely sufficient. It communicates the main return scope ('in full') and the notable related-commentary links. A minor gap is that it does not clarify what fields 'full' entails or how missing/invalid IDs are handled, but the operation is straightforward.

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%, so the description must compensate for the undocumented newsId parameter. The phrase 'Fetch one news article' makes it clear that newsId identifies which article to fetch, but the description does not explain the expected format, provenance, or how the ID relates to other tools. This is adequate for a single self-descriptive parameter but not thorough.

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 uses a specific verb and resource: 'Fetch one news article in full,' which clearly identifies the operation and target. It also notes the inclusion of related-commentary links, helping distinguish this tool from list_news and related_commentary siblings.

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 implies usage: use this when you need a single full news article by its ID. However, it does not explicitly compare with sibling tools like list_news, related_commentary, or get_document, nor state when one alternative should be preferred over another.

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