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

The readOnlyHint, idempotentHint, and openWorldHint annotations already cover the main behavioral guarantees dates; the description adds that the result is a summary with category, currency, and timezone counts. No additional behavioral disclosure is offered beyond that, which is acceptable for a simple read-only tool.

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, compact sentence that puts the core action and key output content up front. It wastes no words.

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?

For a simple read-only lookup with full schema coverage, an output schema, and strong annotations, the description is sufficient. It could improve slightly by positioning the tool relative to get_destination, but this is not a major 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?

The schema already fully describes the destination parameter, including how to find a value via search_destinations, so the description does not need to compensate. The tool description adds little beyond implying the destination is identified by name, which the schema already conveys.

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 clearly states the tool fetches a summary of a named destination with specific content (counts by category, currency, timezone). It distinguishes itself from sibling destination tools by framing the output as an overview, though it doesn't explicitly contrast with get_destination.

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?

No guidance is given about when to prefer this tool over alternatives like get_destination or destination_facets. The parameter description usefully says to call search_destinations to discover a destination, but this is a lookup hint rather than usage guidance for the tool itself.

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