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 usefully adds 'current' (freshness) and 'one public section' (scope limit), but says nothing about result volume, pagination, or recency window, which are the traits that matter for a live-news feed.

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, front-loaded with the verb and resource, with the prerequisite tacked on at the end. No filler and nothing redundant.

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 no explanation, and the single required param is fully documented in the schema. The description covers scope and prerequisite adequately; only the absence of any freshness/pagination hint keeps it from being fully complete.

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 100%: the single 'section' param already enumerates ten valid slugs. The description only restates the constraint ('must come from inquirer_sections'), adding no format or validation detail beyond the schema, so it sits at the baseline.

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?

States a specific resource (Philippine Daily Inquirer headlines) scoped to one public section, which is more precise than a bare 'get headlines'. It does not, however, distinguish itself from the sibling inquirer_news, so an agent still has to infer which of the two carries section-scoped headline listings.

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 inquirer_sections' is an explicit prerequisite and routes the agent to the sibling that produces valid slugs. There is no guidance on when to prefer this over inquirer_news or inquirer_article, so it stops short of full when/when-not coverage.

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