gumroad_list_subscribers

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

The description lacks behavioral information beyond the obvious 'list' operation. With no annotations, it should disclose aspects like read-only nature, authentication via api_key, pagination limits, or response structure. None are provided.

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 with a single sentence that front-loads the core purpose. While it is efficient, it could include a bit more context without becoming verbose.

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?

Given the absence of an output schema and annotations, the description fails to provide essential details such as response format, pagination, or error handling. This is insufficient for a listing tool with three parameters.

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 coverage is 100%, so the schema already describes all three parameters (api_key, product_id, email). The description does not add any additional meaning, examples, or constraints beyond the schema, resulting in a baseline score of 3.

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 lists subscribers for a Gumroad membership/subscription product. It specifies the verb 'list' and the resource 'subscribers', distinguishing it from siblings like gumroad_list_products and gumroad_list_sales.

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?

No usage guidance is provided. The description does not mention when to use this tool versus alternatives like gumroad_list_sales, nor does it state prerequisites such as requiring a product_id for a subscription product.

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