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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false, and openWorldHint=false, so the safety profile is fully covered without description help. What the description does add is the return payload shape (ratings, renovation date, airlines, lounges), which is useful since no output schema exists. It says nothing about error behavior for an unknown slug or response size, so it earns a moderate score rather than a high one.

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?

One short sentence with zero filler, and the most substantive content (amenities and lounges) is front-loaded. The only deduction is that it is a sentence fragment, which makes the framing slightly weaker than an explicit verb-led statement.

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 single-parameter read tool with rich annotations and no output schema, listing the returned fields is the main thing the description needs to do, and it does that. It still omits the lookup-failure behavior and the search-then-get workflow that would make the definition self-sufficient.

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 single parameter's schema entry already explains that it accepts a slug or UUID and points to search_terminals. The description adds no further meaning about accepted formats or how to obtain an identifier, so the baseline of 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 enumerates the payload well (amenity ratings, renovation date, airlines, lounges), so an agent can infer this retrieves details for one terminal. However, it is a bare noun phrase with no verb ("Returns...", "Fetches..."), and it never distinguishes itself from siblings like get_airport, get_lounge, or list_terminal_airlines. The purpose is implied rather than stated.

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 exclusions, and no named alternatives. The only routing hint — that search_terminals lists slugs — lives in the input schema, not the description. An agent must infer that this is the detail call after a search call.

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