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

Annotations already declare readOnlyHint=true and openWorldHint=true, so safety and freshness profile are covered. The description adds the "one public section" constraint and the cross-tool dependency, but says nothing about ordering, limits, or what "current" means in time terms.

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, followed immediately by the 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?

Output schema exists so return values need no explanation, and annotations cover the read-only/open-world profile. The description supplies the key prerequisite and scope; only minor details (recency window, result count) 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 100% and the slug values are enumerated in the schema, so the baseline is 3. The description goes slightly further by stating the authoritative source for valid slugs (theverge_sections), which is meaningful validation context beyond the schema.

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 headlines) scoped to one public The Verge section, which cleanly separates it from theverge_news and theverge_article. The reference to theverge_sections pins down exactly which content slice this returns.

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?

"section must come from theverge_sections" is an explicit prerequisite that tells the agent to call the sibling first, which is real routing guidance. It does not, however, say when to prefer this over theverge_news or theverge_article.

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