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

Annotations already declare readOnlyHint=true and openWorldHint=true, so safety and openness are covered. The description adds only the word 'current' (recency) and 'public section' (scope restriction); it says nothing about result volume, pagination, or ordering, though the output schema presumably carries the return shape.

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 short sentence with the resource and its constraint front-loaded; no filler or restatement of the name.

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 single-parameter read tool with an output schema and full annotation coverage, the description is adequate: it names the resource, the scope, and the upstream dependency. Minor gaps remain around how many headlines are returned and the recency window, but these are not critical for correct invocation.

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 100% and the single 'section' parameter already enumerates documented slugs. The description's added value is the constraint that the value should originate from rollingstone_sections, which is a workflow hint the schema does not state, but it adds no format or syntax detail. Baseline 3 is appropriate.

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 resource (Rolling Stone headlines) with a scoping constraint ('one public section'), which is enough to separate it from rollingstone_news and rollingstone_article. It stops short of explicitly contrasting with those siblings, so an agent must infer the difference from the name alone.

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?

The clause 'section must come from rollingstone_sections' is an explicit prerequisite that tells the agent to call the sections tool first, which is real routing guidance. It offers no exclusions or alternative tools for other headline needs (e.g., all-sections coverage), so it is clear context rather than 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.