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

Annotations already declare readOnlyHint=true, idempotentHint=true and destructiveHint=false, so the safety profile is covered. The description goes beyond that by disclosing the actual classification thresholds — the 180-day window and the trip-end comparison rule — which is real behavioral context an agent cannot get from the annotations or schema.

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 tightly written sentence with the action front-loaded and the flag criteria enumerated parenthetically. Every clause carries information and nothing is 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?

For a read-only tool with no output schema, the description conveys what is examined and the categories that will be flagged, which is enough for correct invocation. It stops short of describing the actual return shape or what happens when trip_id is omitted, which leaves a minor 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% for the single trip_id parameter, so the baseline is 3. The description only lightly reinforces the schema by tying trip_id to the 'expiring before trip end' criterion; it does not add format, default-behavior, or omission semantics beyond what the schema already says.

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 (audit), a specific resource (the user's travel documents: passports, visas, insurance), and the exact outcome criteria (expired, expiring soon <180 days, expiring before trip end). No sibling tool does document auditing, so an agent can select this without ambiguity.

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?

Usage is implied rather than stated: the optional trip_id and the 'expiring before trip end' criterion signal that the tool is for pre-trip document checks. There is no explicit when-to-use, when-not-to-use, or named alternative (e.g. the related travel_document_assign_trip), so guidance remains inferential.

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