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

Annotations already declare readOnlyHint=false and destructiveHint=false, so the agent knows this mutates state but is not destructive. The description adds only the vague notion of an 'existing durable recovery path' and does not explain side effects, idempotency, or state transitions. It does not contradict the annotations, but it contributes little behavioral context beyond them.

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 one short sentence with no filler, repetitions, or extraneous clauses. It is front-loaded with the action verb 'Resume' and is structurally efficient. However, the brevity comes at the cost of clarity, so it is not a perfect score.

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 and a single parameter that is undocumented, the description needs to explain what the 'durable recovery path' is, what purchase states qualify, and what success or failure looks like. The annotations cover the safety profile but not these operational details, leaving the description incomplete for an agent deciding whether and how to call this tool.

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?

The input schema has 0% description coverage, and the description never mentions paymentIdentifier or how to supply it. The parameter name is somewhat self-explanatory, but the description adds no semantic value beyond the raw schema and fails to compensate for the lack of schema documentation.

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 names a specific action ('Resume') and resource ('an owned uncertain purchase'), and references a recovery mechanism, so it is not a tautology. However, the phrasing is jargon-heavy and does not clearly explain what makes a purchase 'owned' or 'uncertain' or how this differs from the similar sibling recover_commerce_purchase. The core purpose is mostly clear but under-specified.

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 guidance is given about when to use this tool versus alternatives such as recover_commerce_purchase, get_purchase_recovery_status, or execute_authorized_purchase. The phrase 'owned uncertain purchase' implies a state precondition, but it is not clearly stated, and there are no exclusions or alternative routing hints.

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