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

Annotations already declare readOnlyHint=true and openWorldHint=true, covering the safety and scope profile. The description adds only that results are 'current' and limited to one section; no return format, pagination, or freshness details, which is acceptable given the output schema exists.

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 sentence, front-loaded with the resource and scope, and the section-source constraint is attached directly. No wasted words.

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 handling return values and annotations covering safety, the description only needs to cover the one input constraint, which it does via the ew_sections dependency. It is complete enough to invoke correctly, though an explicit note on section identifier format would close the last gap.

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 0% and there is one parameter, so the description must carry the meaning. It does supply the critical semantic: the section value comes from ew_sections, which tells the agent where to source valid values. It lacks any format or example, keeping it below a 5.

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+resource ('headlines') with the source ('Entertainment Weekly') and scope ('one public section'). This cleanly distinguishes it from ew_news and ew_article, which cover broader news or individual 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?

It gives actionable context by requiring the section to come from ew_sections, which is a prerequisite. It doesn't explicitly name alternatives like ew_news, but the scope is unambiguous enough for an agent to choose correctly.

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