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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=true, so the safety profile is covered and the description only needs to add context. It does add the shape of the returned analytics (prices, route availability, direct flights, airlines), but says nothing about localization behavior, caching, or result limits.

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 that names the resource first and then the payload contents, with no filler or repetition of schema detail.

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, the description need not explain return values, and annotations carry the safety profile, so the remaining requirement is routing context. It covers what the tool returns but omits the origin-vs-destination selection rule, which is the one thing an agent could get wrong among these siblings.

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 explains originCode as 'alternatives on this side', destinationCode, locale localization, and the currencyCode enum. The description adds no parameter-level meaning beyond the schema, so the baseline 3 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 states a specific verb and resource ('Returns analytics for airports ... on the origin side of a route') and enumerates the data returned (prices, route availability, direct flights, airlines). The phrase 'origin side' implicitly separates it from the destination-side sibling, but it never names that sibling or any other alternative outright.

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?

There is no when-to-use guidance, no stated prerequisite (e.g., that originCode/destinationCode are required and must be resolved via resolve_city_iata_code), and no mention of when to prefer this over get_route_destination_airports_analytics or search_route_prices. The agent must infer usage entirely from the name and schema.

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