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

The annotations already cover read-only, idempotent, non-destructive, and closed-world behavior. The description adds useful context beyond that by clarifying badge semantics ('No badge means the route is not currently verified') and explicitly stating it does not start checks or submit requests. It does not cover auth or rate-limit behavior, but those are less critical here.

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?

The description is front-loaded with the main action and contains no filler. The first sentence lists several return fields in a dense way, which is slightly less scannable, but the overall text is appropriately sized.

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 no output schema, the description carries responsibility for explaining return values and does so by listing checked scope, actor, region, capture time, expiry, and failures. It also explains the badge interpretation. Some terms like 'independently checked scope' remain vague, but the core behavior is adequately covered.

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%, so the schema fully documents the single route parameter as an exact route ID, domain, or published guide slug. The description only mentions 'domain or route ID' and omits the guide slug option, so it adds little and slightly narrows the schema's stated semantics.

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-resource pair: read the exact official route variants and current verification details for a domain or route ID. It partially differentiates from siblings by saying it never starts a check or submits a request, which separates it from request_recheck and submit_approved_plan, though it does not explicitly distinguish itself from get_library_verification_status.

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?

Usage is implied rather than explicit: the tool is framed as a read-only status retrieval, and the line 'never starts a check or submits a request' signals it should not be used to trigger rechecks. However, there is no explicit 'use this when...' guidance or direct naming of alternatives such as request_recheck.

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