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

Annotations declare readOnlyHint=true and openWorldHint=true, covering the safety profile. The description adds that the sections are 'public editorial or RSS', which gives useful content-type context, but does not disclose operational details like authentication or rate limits. With annotations doing the heavy lifting, this is adequate.

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?

The description is a single, front-loaded sentence with no wasted words. It could be slightly more structured with an explicit verb, but it is appropriately sized for a zero-parameter lookup tool.

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?

Given the simplicity (0 params, output schema present, annotations provided), the description is complete enough. It states what the tool returns and its relationship to rte_headlines, leaving return values to the output schema.

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?

The tool has zero parameters, so there are no parameter semantics to explain. Baseline 4 applies.

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 the specific resource (RTÉ News public editorial or RSS sections) and distinguishes it from siblings like rte_headlines and rte_article by being about sections. It lacks an explicit action verb, but the resource is clear enough for an agent to understand it returns a list of sections.

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 phrase 'accepted by rte_headlines' provides clear context: this tool surfaces valid section values for use with rte_headlines. No explicit when-not or alternative routing is given, but the implied usage is strong and unambiguous.

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