Get Subscription Status

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

No annotations are provided, so the description carries the full burden for behavioral transparency. It only says 'Get the status of a subscription purchase,' which implies read-only behavior but does not disclose what statuses may be returned, whether it validates ownership, or any operational details beyond the basic action.

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, front-loaded sentence with no filler or redundant information. Every word contributes to stating the core operation.

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 simple read operation with a fully documented schema and an output schema present, the description is minimally adequate. However, with no annotations and many subscription-related siblings, a note about which subscription-related tools it is preferable to over (or used in combination with) would improve contextual completeness.

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 100% description coverage for all three parameters (package_name, purchase_token, and subscription_id), so the baseline is 3. The description adds no additional parameter semantics, but it doesn't need to because the schema already documents them.

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 clearly states a specific verb and resource: 'Get the status of a subscription purchase.' The phrase 'subscription purchase' hints at the object being a purchase record rather than a subscription product, which partially distinguishes it from siblings like get_subscription, though it doesn't explicitly call out that distinction.

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?

There is no guidance about when to use this tool versus alternatives such as get_subscription, list_subscriptions, get_order, or get_product_purchase. The description simply states the action with no mention of preconditions, exclusions, or recommended use cases.

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