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. The description adds only 'with their latest tracking state', which hints at freshness but says nothing about pagination behavior, result ordering, or what happens with large watchlists. With annotations carrying the behavioral weight, this partial contribution is a 3.

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 with no filler; the resource and scope come first. It is appropriately sized, though its brevity shades into under-specification rather than elegance.

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 explained, but the tool has two undocumented parameters and no differentiation from the similar sibling get_tracked_aircraft_snapshots. For a list endpoint with pagination, the description is too thin.

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% and the description never mentions limit or offset, so an agent gets no guidance on pagination, defaults, or ranges. With two undocumented parameters, the description fails to compensate for the schema gap.

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 ('List') and resource ('tails on your watchlist') plus the returned state, so the tool's function is immediately clear. It does not, however, distinguish itself from sibling get_tracked_aircraft_snapshots, which appears to cover related ground.

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 statement of when to use this versus siblings such as get_tracked_aircraft_snapshots or list_* market tools, and no prerequisites or exclusions. Usage is only implied by the phrase 'on your watchlist'.

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