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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety and live-data profile is covered. The description adds two useful traits beyond that — 'Current' (freshness) and 'one public section' (single-section scope, public only) — but says nothing about result volume, pagination, or rate limits.

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 tight sentence with two clauses: the capability first, the input constraint second. Zero filler, nothing redundant with the name.

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?

Output schema exists, so return values need no explanation. For a one-param read-only list tool with annotations covering safety, the description supplies everything needed: what it returns, its scope, and where the required input value comes from.

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% and the single 'section' param is an unconstrained string, so the description carries the burden. It does add real value by stating valid values come from inquirer_sections, but it omits the expected format (slug vs. display name), which the agent needs to call correctly.

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 verb (retrieve headlines) and resource (Philippine Daily Inquirer), with the scope narrowed to 'one public section'. It also implicitly separates itself from inquirer_sections by naming that tool as the source of valid section values, so an agent can route correctly without opening the schema.

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 precondition and names the sibling tool that produces valid inputs. It does not, however, state when to prefer this over inquirer_news or inquirer_article, so the routing guidance is incomplete.

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