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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so safety behavior is covered. The description adds useful conditional behavior: after payment it returns coupon notifications and a separate delivery token when files are ready. It still omits auth requirements, error behavior, and what happens in non-payment states.

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 only two sentences and contains no obvious filler. It is front-loaded with the checking action, though the second sentence is a dense conditional return description that could be clearer.

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 read-only tool with two required parameters and no output schema, the description should explain parameter meaning and return behavior more fully. It partially describes returns (coupon notifications, delivery token) but does not explain request_capability or clarify when this tool should be used instead of its many siblings.

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 0%, and both request_id and request_capability are required parameters. The description never mentions either parameter, so it provides no meaning or format guidance beyond the schema names themselves.

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 uses a specific verb ('Check') and names several statuses it verifies: email verification, order creation, and verified payment status. It also states that it returns coupon notifications and a delivery token. However, it does not distinguish this tool from close siblings like get_order or get_request, and it blends payment status with broader workflow statuses.

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 explicit guidance on when to use this tool versus alternatives, despite many sibling tools covering related workflows such as verify_email, get_order, and get_request. The post-payment mention implies one context, but it does not state exclusions or routing conditions.

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