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

Annotations already declare destructiveHint: true, indicating this is a destructive operation. The description adds the REST endpoint reference but does not disclose additional behavioral traits such as reversibility, side effects on customer access, or required permissions. With annotations covering the destructive nature, a score of 3 reflects the minimal extra context 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 a single sentence plus a technical endpoint reference. It is exceptionally concise and front-loaded, with no wasted words. This is ideal for a simple tool.

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 simplicity of the tool (2 params, no output schema, annotations present), the description is adequate. It explains the core action and the endpoint. It could mention the effect on the license (e.g., irreversible) or the relationship with enable_license, but these are not essential given the annotations and clear purpose.

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%, with both product_id and license_key having clear descriptions. The tool description does not add any parameter details beyond what the schema already provides, so the baseline of 3 is 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 uses a specific verb and resource: 'Disable a product's license key.' This clearly distinguishes it from sibling tools like gumroad_enable_license and gumroad_verify_license, making the tool's purpose 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 gives no explicit guidance on when to use this tool versus alternatives. It does not mention that this should be used instead of disable_product or how it relates to enable_license/verify_license. There is no context beyond the basic action.

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