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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description usefully adds pagination behavior, the { data, total } response shape, and that hyphens are stripped from reg input — real behavioral detail beyond annotations, though nothing about rate limits or default page size.

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?

Compact and front-loaded, opening with the paginated directory framing before enumerating filters. Slightly dense parenthesis-heavy phrasing ('sortBy (AircraftList scalar)') but no wasted sentences.

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?

An output schema exists, so return values need not be spelled out. Given 9 parameters at 0% schema coverage, the description covers most filters but leaves page/limit behavior and ownopSearch unaddressed, so it is adequate rather than complete.

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 0%, so the description must carry the load and largely does: it explains reg hyphen-stripping, the 2-letter country constraint, and that icaoSearch/regSearch/usedBySearch are substring matches. It omits page, limit, and ownopSearch semantics, so it is not fully complete.

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: a paginated aircraft directory (AircraftList). An agent can distinguish it from Flight_get_aircraft_detail and Flight_get_aircraft_from_list by the listing/pagination framing, though the description never names those siblings explicitly.

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 explicit when-to-use or when-not guidance. The listed filter options imply a browse/search use case, but there is no statement of when to prefer this directory over get_aircraft_detail or get_aircraft_from_list, nor any prerequisite context.

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