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

Annotations already declare readOnlyHint=true and openWorldHint=true, so safety is covered. The description adds only the freshness cue ('Current') and the 'public section' scoping constraint; it says nothing about result volume, ordering, or pagination behavior that an agent couldn't infer.

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 scoping constraint and the parameter provenance are both packed into the first clause pair.

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?

With an output schema present, return values need no explanation, and the one required parameter's provenance is documented. The definition is self-sufficient for invocation, though it leaves a small gap on how this differs in coverage 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 0% and the lone parameter is an undescribed string, so the description must carry the load. It does: it identifies the parameter as a section and, critically, tells the agent the valid value source (cbsnews_sections), which is the key semantic the bare schema lacks. It still omits format/example values, so not a 5.

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' scoped to 'one public section'. This separates it from cbsnews_sections (which supplies section identifiers) and cbsnews_article (single story). It does not explicitly draw the line against the sibling cbsnews_news, so sibling differentiation is only partial.

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 cbsnews_sections' gives an explicit prerequisite and names the tool that provides valid values, which is strong routing guidance. However, it never says when to prefer this over cbsnews_news or cbsnews_article, so the when-not/alternative side is missing.

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