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

Despite annotations already indicating read-only and non-destructive behavior, the description adds explicit behavioral transparency by stating it never starts a purchase or bypasses payment. This reinforces the safety profile beyond the annotations.

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 concise, consisting of two clear sentences. It immediately states the core function and then clarifies a key boundary, with no unnecessary wording.

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?

The description provides sufficient context for a simple tool: it names the specific resource (checkout link and x endpoint) and the purpose (paid audit). It does not explain the output or the meaning of the product parameter, but given the lack of an output schema and the straightforward nature, it is reasonably complete.

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 description does not explain the meaning or implications of the 'product' parameter values (metadata, audit, history, competitors, agent-performance). While the enum values may be self-explanatory in context, the lack of any elaboration leaves room for ambiguity about what each product option entails.

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's purpose: to get the official Apify Store checkout link and x endpoint for a paid audit. It explicitly distinguishes itself from initiating a purchase, making its role unambiguous.

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 specifies that it is for 'one paid audit' and clarifies that it never starts a purchase or bypasses payment, providing useful guidance. However, it does not explicitly compare with sibling tools like discover_products or preflight_website, so guidance on when to prefer this tool is somewhat implicit.

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