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

Annotations already declare readOnlyHint and openWorldHint, so the safety profile is covered. The description adds the section-scoping rule but says nothing about recency window, item count, or ordering behavior that would help an agent predict results.

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, with the constraint appended. No filler, nothing to trim.

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?

An output schema exists, so return values need not be explained, and the required-parameter path is covered by the cross-reference to fastcompany_sections. Reasonably complete for a simple one-param read tool; only pagination/volume expectations are absent.

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% for the single 'section' parameter, so the description carries the burden and does add value: it tells the agent the value must originate from fastcompany_sections, which the bare string schema does not convey. It stops short of naming the field format (slug vs. display name).

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+scope: current headlines for a single public section, which separates it from fastcompany_article and fastcompany_news. The word 'public' also signals a constraint, though it doesn't explicitly contrast with the sibling news/article tools.

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?

Names the prerequisite source for the section value (fastcompany_sections), which is real routing guidance. It doesn't say when to prefer this over fastcompany_news or fastcompany_article, so it stops short of explicit 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.