Revoke Subscription Purchase

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

With no annotations, the description carries the full burden of disclosing side effects, but 'Revoke (refund)' only hints at a financial mutation. It does not state that the action is irreversible, that a refund token may be required, or what happens to the user's subscription access.

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 seven-word sentence is lean and the parenthetical 'refund' is useful clarification, so there is no redundancy. However, the brevity is closer to under-specification than true conciseness, given the number of parameters and the ambiguous sibling landscape.

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 destructive financial operation with five parameters and many closely related sibling tools, this description is insufficient. The presence of an output schema excuses return-value details, but behavioral, selection, and parameter semantics are all missing, so the agent is not equipped to invoke it correctly.

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 description adds no parameter-level meaning. The schema documents package_name, purchase_token, and refund_type, but leaves confirm and confirmation_token undefined, and the description does not clarify how these fields interact or when they are needed.

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 action ('Revoke (refund)') on a specific resource ('a subscription purchase'), so the core operation is clear. However, it does not differentiate from sibling tools such as cancel_subscription_purchase, defer_subscription_purchase, or refund_order, which all relate to the same purchase lifecycle.

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 description provides no guidance on when to use this tool instead of the many sibling purchase/subscription tools, and no mention of prerequisites or context. An agent cannot determine whether revoke is appropriate versus cancel or defer without external knowledge.

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