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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds that the article is 'public' (no auth) and that body paragraphs plus metadata are returned, which is modest extra context; an output schema exists so return shape is handled elsewhere.

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?

A single tight sentence with no filler, front-loading the resource and the returned content. Slightly terse given the residual gaps, but nothing is wasted.

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 one-parameter single-article fetch with an output schema and read-only annotations, the description is minimally adequate: it conveys source, scope, and returned content. It omits any mention of the URL parameter or error behavior, leaving some gaps for a definition that must stand alone at selection time.

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?

With one parameter and 0% schema description coverage, the description does not explain the 'url' argument at all. However, the parameter name is fully self-explanatory and required, so the schema alone conveys the needed semantics; the description neither adds nor misleads.

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 names the specific resource (a single 7NEWS Australia article) and what it yields (metadata and body paragraphs), which distinguishes it from siblings like sevennewsau_headlines and sevennewsau_news that return collections. It stops short of an explicit verb such as 'fetch/retrieve', but the intent is 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?

There is no statement of when to use this tool versus sevennewsau_headlines or sevennewsau_news, nor any precondition beyond the implied 'you have an article URL'. Usage can be inferred from the name, but the description offers no routing guidance.

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