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

No annotations are provided, so the description must carry the full behavioral burden. It states the tool finishes a subscription after a token file is served, but does not disclose side effects, permission requirements, what happens on failure, or whether the action is reversible.

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 wasted words. It is appropriately sized for the tool's apparent simplicity, though the phrase 'verify=well_known' is slightly opaque.

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?

Without annotations, an output schema, or rich parameter documentation, the description should do more to explain what 'finishing' a subscription entails. It gives only a precondition and omits result, side effects, and error behavior, leaving the agent under-informed for a potentially mutating step.

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 is documented as 'sub_...'. The description adds no syntax, format, or meaning beyond what the schema already provides, so the baseline of 3 is appropriate.

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 'Finish' and the resource 'verify=well_known subscription', making the intended action clear. It does not differentiate from sibling verification tools like verify_domain_start or verify_domain_check, and the 'verify=well_known' phrasing is somewhat jargon-y.

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?

Provides a clear precondition: use this after serving the token file. This implies a two-step flow and gives the agent enough context to know when to invoke it, though it stops short of naming alternatives or exclusions.

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