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

Annotations already declare readOnlyHint=true and openWorldHint=true, so safety and open-world behavior are covered. The description adds only the word 'current' to imply recency and the section-scoping constraint; it says nothing about pagination, result count, or ordering.

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 compact sentence, front-loading the resource and then the scoping constraint. No filler.

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 defining the return shape, annotations covering the safety profile, and a fully documented single parameter, the description covers what an agent needs to invoke the tool. The only minor gap is ordering/pagination behavior for a headlines feed.

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?

There is a single parameter with 100% schema description coverage, so the schema already documents the section slug and its origin. The description repeats the 'from fastcompany_sections' constraint without adding format or example values, so 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+resource ('current Fast Company headlines') and scopes it to one public section, which distinguishes it from fastcompany_news and fastcompany_article. The mention of fastcompany_sections as the source of the slug further separates it from the section-listing sibling.

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?

Provides a clear prerequisite/chaining rule: the section value must come from fastcompany_sections. It does not explicitly contrast with fastcompany_news (whole-site feed) or fastcompany_article, so it stops short of full when/when-not guidance.

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