Get Subscription Status

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

No annotations are provided, so the description must carry the burden of behavioral disclosure. It only says 'get,' which weakly implies a read operation, but it does not explicitly state that the tool is non-mutating, does not mention authentication or quota considerations, or clarify whether a subscription purchase status remains unchanged after the call.

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 a single, front-loaded sentence with no filler words, making it concise and easy to parse. However, it is so terse that it omits potentially useful scoping or disambiguation context, so it is concise but not optimally informative.

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?

Although parameters are fully documented and an output schema exists, the description leaves the agent without enough context to reliably select this tool among many similar subscription and purchase-related siblings. It also lacks any statement about side effects, read-only behavior, or when this specific endpoint is appropriate, making it incomplete for an AI agent navigating a large tool set.

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%, with clear descriptions for package_name, purchase_token, and subscription_id. The description adds no additional meaning beyond the schema, so the baseline score of 3 applies.

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 the action ('get') and resource ('subscription purchase'), which distinguishes it from tool names about subscription product definitions or modifications. It is specific enough to understand the basic purpose, but it does not explicitly differentiate it from sibling purchase-status tools like get_product_purchase or acknowledge_subscription_purchase.

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 gives no guidance on when to use this tool versus alternatives such as get_subscription, list_subscriptions, get_product_purchase, or acknowledge_subscription_purchase. It provides no conditions, prerequisites, or exclusions, leaving selection entirely to inference from the name and parameters.

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