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

Annotations already establish a safe read (readOnlyHint, idempotentHint, destructiveHint=false), and the description adds real context beyond them: the normalization parity with submission duplicate detection and the critical caveat that only approved listings are visible, so pending submissions won't be found. It stops short of describing the response shape or any rate 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?

Two tight sentences with no filler; the core behavior comes first and the visibility caveat second, which is the right front-loading for a boolean-style check.

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 one-parameter read tool with annotations covering the safety profile and no output schema, the description covers the essentials, including the important limitation on which listings are visible. Only the nature of the returned result is left unstated.

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?

With a single url parameter and 0% schema description coverage, the schema alone gives no meaning. The description partially compensates by tying the parameter's interpretation to the submission-normalization rules, but adds no format, protocol, or length guidance.

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 (check) and resource (URL listing status on Shipstry), and clarifies the normalization basis, which distinguishes it from search_launches-style tools. It doesn't explicitly name a sibling, but none of the siblings overlap in function.

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?

The phrase 'same normalization as submission duplicate detection' implies the pre-submission duplicate-check use case, but it never states when to prefer this tool over search_launches or what to do with a true/false result. Usage is implied rather than instructed.

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