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 useful context via 'Current' (freshness) and the section-sourcing constraint, but says nothing about ordering, 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?

A single front-loaded sentence with zero filler; the resource is stated first and the constraint follows.

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 and full parameter coverage in the schema plus annotations, the description covers what the agent needs to call it correctly. Only the vague differentiation from walesonline_news leaves a small gap.

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 all valid section slugs, so the baseline is 3. The description adds value by declaring the authoritative source of those values (walesonline_sections), giving the agent a workflow rather than a bare field.

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 (WalesOnline headlines) with a scope qualifier ('Current', 'for one public section'), so an agent readily understands what it returns. It names the sibling tool walesonline_sections as the source of valid values, though it does not explicitly distinguish itself from walesonline_news.

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?

Gives a clear prerequisite: the section value must come from walesonline_sections, which prevents the agent from inventing slugs. It lacks any explicit when-not-to-use guidance or routing against walesonline_news.

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