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 constraint that exactly one 'public' section is returned per call, which is useful scoping context, but says nothing about pagination, freshness, or error behavior for an unknown section.

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 with zero filler; the scope and the source-of-values constraint are both packed efficiently into one clause.

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?

For a one-parameter read-only fetch with an output schema (which removes any need to describe return values) and annotations covering the safety profile, the definition is nearly sufficient. Only the section-value format is left implicit.

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%, so the description must carry the semantic load for 'section'. It partially does by requiring the value to come from nymag_sections, but it doesn't indicate the expected format (slug, name, ID) or cardinality beyond 'one public section'.

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 New York Magazine headlines for one public section.' An agent can distinguish this from nymag_article (single article), nymag_news (news stream), and nymag_sections (section list). It does not explicitly name the sibling it is not, so it falls just short of a 5.

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 ('section must come from nymag_sections'), which both constrains usage and routes the agent to the sibling tool that supplies valid values. It doesn't state when to prefer this over nymag_news or what happens with an invalid section, so no explicit exclusions.

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