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 that results are 'current' (freshness) and restricted to 'public' sections, which is useful but thin; nothing about pagination, result count, or ordering.

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 tight sentence with the resource stated first and the constraint second. Nothing redundant or padded.

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?

The tool is a simple one-required-param read, an output schema exists so return values need no explanation, and the key input constraint is stated. Only minor gaps remain around result volume and how this differs from iol_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 section parameter carries an exhaustive documented value list, so the schema does the heavy lifting. The description adds one meaningful rule, that valid values originate from iol_sections, but no format or matching nuance beyond that.

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 IOL headlines') scoped to 'one public section', which is concrete and actionable. It does not explicitly contrast itself with the sibling iol_news, so an agent must infer whether headlines differ from news listings.

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 real prerequisite: the section value must come from iol_sections, which routes the agent to the correct discovery tool first. It stops short of stating when to prefer this over iol_news or iol_article.

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