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

Goes well beyond the readOnly/openWorld annotations: discloses that results are headlines only with no article text, that links are Google News redirect links rather than canonical drive.com.au URLs, the data provenance, and the exact pay-per-call cost model including that failed calls are not charged. These are material facts an agent could not infer from structured fields.

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?

Front-loads the payload (what is returned, ordering) before provenance, limitations, and pricing, so an agent can stop reading early. It is a dense run-on block and pricing could be one clause shorter, but every sentence carries decision-relevant information.

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?

Annotations cover the safety profile, an output schema exists so return shapes needn't be narrated, and the description fills the remaining gaps: paywall/cost, headlines-only limitation, redirect-link behavior, and the reason for the proxy source. Nothing an agent needs to call it correctly is missing.

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%, so the schema already documents q, days (1-30, default 7) and limit (1-100, default 20). The description restates the date window and the optional keyword matching but adds no syntax, format, or edge-case detail beyond that. Baseline 3 applies.

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 (search/retrieve) plus a precisely scoped resource (Drive.com.au articles via Google News RSS), and enumerates the returned fields with ordering ('newest first'). It is clearly distinguishable from the broad sibling search_google_news and from other publisher-specific siblings like search_reuters_articles.

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?

Usage is implied through the optional 'q' overlap and the 1-30 day window, and it explains why this route is used ('the site blocks automated clients'). However, it never names an alternative tool or states when a caller should pick search_google_news or a different publisher search instead.

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