get_news_by_topic

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

Annotations already declare readOnlyHint, openWorldHint, and destructiveHint false, so the safety profile is covered. The description adds only 'recent' and 'predefined category' scope; it does not reveal operational details such as result handling or network dependence, which is acceptable but not rich.

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?

Two front-loaded sentences with no filler; the primary action is stated first and the alternative is given second, making it easy to scan.

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, full parameter documentation, and safety annotations in place, the description covers tool selection and enough operational context. It does not explain how this tool differs from every other news sibling, but the explicit keyword distinction is sufficient; a 4 reflects the slight gap in broader sibling differentiation.

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 baseline is 3. The description adds value by illustrating valid topic values (BUSINESS, TECHNOLOGY, SPORTS) and clarifying that topic refers to a predefined category, which helps correct parameter use beyond the schema's generic wording.

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 begins with a specific verb and resource: 'Find recent Google News articles from a predefined Google News topic category.' It clearly distinguishes itself from get_news_by_keyword by contrasting category browsing with free-form query.

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?

It explicitly states when to use this tool ('for topic category browsing') and names the alternative (get_news_by_keyword) for free-form queries, giving clear routing guidance.

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