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 only the scoping constraint that a single public section is required; it says nothing about freshness windows, pagination, or result volume.

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 compact sentence, front-loading the resource and then the constraint, with no redundant or filler text.

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 and annotations present, the return format and safety profile are already covered, and the sole parameter is fully documented. The definition is essentially complete for this simple one-parameter tool, lacking only any note on result freshness or alternative headline feeds.

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 allowed slug values are documented inline, so the baseline would be 3. The description adds useful provenance beyond the schema by pointing to pcgamer_sections as the authoritative source of valid section values.

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?

The description names a specific resource (PC Gamer headlines) and constrains scope to a single public section, which distinguishes it from the all-sections tools. It stops short of differentiating from pcgamer_news, which the agent must infer is a different feed.

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?

It gives an explicit prerequisite by stating the section must come from pcgamer_sections, effectively routing the agent to the sibling that supplies valid values. There is no when-not-to-use guidance or mention of the other headline-adjacent tools.

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