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 by structured data. The description adds only the freshness signal ('Current'); it says nothing about rate limits, result caps, or ordering, which would be the value-add beyond annotations.

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 front-loaded sentence with a semicolon clause; the resource and the input constraint are both stated with zero filler. Nothing could be removed without losing meaning.

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?

With an output schema present, return values need not be explained, and annotations cover safety. The description supplies the resource, scope, and input constraint, leaving only minor gaps such as result volume or refresh cadence.

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 100% and it already enumerates documented slugs, so the baseline is 3. The description goes slightly beyond by naming apnews_sections as the authoritative source for valid section values, adding cross-tool linkage the schema does not express.

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 verb and resource ('Current AP News headlines') plus a scope ('one public section'), which is enough for an agent to distinguish it from apnews_article. It does not explicitly differentiate from the sibling apnews_news, so it stops short of a 5.

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 clause 'section must come from apnews_sections' is a useful prerequisite and routes the agent to the right companion tool for valid inputs. However, there is no when-to-use guidance relative to apnews_news or apnews_article, so usage is only implied.

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