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

Annotations already declare readOnlyHint=true and openWorldHint=true, so safety is covered. The description adds genuinely new context: the list of returned fields (there is no output schema) and the quota cost of 7 points per call — an important operational constraint. It doesn't mention page-size limits or result ordering, but that is minor against what it does disclose.

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?

The definition is short and front-loaded, with purpose first and cost last. The English and Korean sentences duplicate the same content, which is a small space cost but is plausibly intentional for a bilingual service.

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 simple, 2-parameter, read-only search tool with no output schema, the description covers the return fields and the per-call cost — the two things an agent can't read from structured data. Nothing critical, such as pagination limits, remains unaddressed.

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%: keyword (1–200 chars) and page (1–10, default 1) are both documented in the schema. The description adds nothing about either parameter, so the 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?

The description pairs a specific verb and resource ('Google News search') with the exact fields returned (title, publisher, published time, link), so the agent knows precisely what comes back. It does not, however, explicitly distinguish itself from google_search, google_image_search, or google_shopping_search, which are the closest siblings.

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 about when to use this tool versus the other search tools in the catalog, and no prerequisites or exclusions. The only usage signal is the tool name and the mention of news fields, which the agent must infer.

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