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

No annotations are provided, so the description must carry the full behavioral burden. It mentions that trial info and escrow status are included, but it does not state that the operation is read-only, what permissions are required, whether any side effects occur, or what the full response contains.

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 unnecessary wording. It efficiently states the resource and the notable included fields.

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 low-complexity two-parameter retrieval tool, the description is minimally adequate. However, with no output schema and no annotations, it should do more to explain the return shape and usage context beyond naming trial info and escrow status.

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%, so the input schema already documents both parameters, including the chain enum and default. The description adds no additional parameter meaning beyond what the schema provides, making the baseline score appropriate.

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 identifies a specific resource, subscription detail, and names included content such as trial info and escrow status. It is clear what the tool retrieves, but it does not explicitly differentiate itself from sibling subscription tools like actora_subscription_check or actora_subscription_my_list.

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 on when to use this tool versus alternatives such as actora_subscription_check, actora_subscription_my_list, or actora_subscription_plans. The intended retrieval context is only implied by the word 'detail'.

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