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 external-data profile. The description adds that headlines are 'current' and for a 'public' section, plus the dependency on newsweek_sections, but does not disclose behavior like invalid-section handling, rate limits, or pagination.

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?

A single front-loaded sentence that conveys purpose, scope, and a key constraint with 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?

Given a simple tool with annotations covering safety and an output schema covering return values, the description is nearly complete: it clarifies resource, scope, and parameter source. The remaining gap is the exact format of the section value and any alternatives to this tool.

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% for the single required parameter, so the description must compensate. It does so meaningfully by stating that the 'section' value must come from newsweek_sections, which tells the agent where to find valid inputs; format details (slug vs. name) are still omitted.

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 resource ('Newsweek headlines') and scope ('for one public section'), and distinguishes itself from sibling newsweek_sections by requiring a section value that comes from it. An agent can tell it retrieves current headlines for a given section, not general news or full 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?

Explicitly tells the agent when to use it: after obtaining a section from newsweek_sections. However, it does not name alternatives such as newsweek_news for unfiltered news or newsweek_article for full articles, nor does it state when not to use this tool.

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