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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds the 'current' freshness cue and the per-section scoping constraint, but says nothing about pagination, result counts, or whether an invalid section errors or returns empty.

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 tight sentence with no filler; the resource is front-loaded and the constraint follows immediately. 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?

One required parameter with full schema documentation and an output schema covering return shape, so the description need not explain values. The provenance hint for the parameter closes the only remaining gap, making this sufficient to invoke correctly.

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 schema already enumerates documented section values, so the baseline is 3. The description goes slightly beyond that by specifying the authoritative source for valid values (nydailynews_sections) and constraining the parameter to a single section, which is useful guidance the schema does not convey.

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) with a clear scope qualifier (one public section), which cleanly separates it from nydailynews_article (single article), nydailynews_news, and nydailynews_sections (the section list). An agent can tell what it returns without opening the schema.

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 the section value must come from nydailynews_sections, which is real routing guidance to the sibling tool. It does not, however, state when to prefer this over nydailynews_news or whether only one section can be passed per call versus multiple.

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