billing_getSubscriptionListV1

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

No annotations are provided, so the description must cover behavioral traits. It implies a safe read operation by using 'Retrieve', but it does not explicitly state that it is read-only, nor does it mention authentication, rate limits, or pagination behavior.

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 very concise with two short sentences. It is front-loaded with the main action and provides an immediate use case. No extraneous words.

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?

No output schema is provided, so the description should convey what the response contains. It says 'list of all subscriptions' but does not specify the fields in each subscription object (e.g., id, status, billing period), which could leave an agent uncertain about the return format.

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?

There are no parameters, so the description does not need to explain parameters. The schema coverage is 100% trivially, and with zero parameters, the description adds no additional meaning but is not required to.

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 tool retrieves a list of all subscriptions associated with the account. It uses specific verb 'Retrieve' and resource 'list of all subscriptions', and it is distinct from sibling billing tools like billing_getPaymentMethodListV1 or billing_getCatalogItemListV1.

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 includes a usage hint ('Use this endpoint to monitor active services and billing status'), which provides context. However, it does not specify when not to use it or mention alternatives among sibling tools.

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