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 genuine context not in the annotations: results are 'current' and scoped to a single public section, and the section value must originate from cbsnews_sections. No return-format detail, but an output schema exists.

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 no filler; both the purpose and the key constraint ('section must come from cbsnews_sections') are stated without waste.

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 tool with annotations covering safety and an output schema covering returns, the description supplies the essential missing piece (valid section sourcing). It is nearly complete, though it could note how it differs from cbsnews_news.

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 schema already enumerates documented section slugs, so parameter semantics are fully served structurally. The description only adds the cross-tool constraint on where to source the value, which is a marginal addition over the schema; 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 verb+resource ('Current CBS News headlines') and scopes it to 'one public section.' It distinguishes itself reasonably from the sibling cbsnews_news and cbsnews_article by naming headlines, though it does not explicitly contrast against them.

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 cbsnews_sections' gives explicit prerequisite guidance pointing to a sibling tool. It lacks an explicit when-to-use vs cbsnews_news (the full-article/news siblings), but the input constraint is a concrete routing rule.

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