amber_cancel_subscription

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

Describes key behaviors: access continues until next_billing_date, data preserved, webhook delay, return codes. No annotations exist, so description carries full burden and handles it well.

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?

Two compact paragraphs with front-loaded purpose. Every sentence adds value—no wasted words.

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?

Covers all important aspects for a one-parameter cancellation tool: when to use, behavior, return values, and async nature. No output schema, but description compensates effectively.

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 provides 100% description coverage for the single confirm parameter. Description adds value by explaining the return code when false, providing context beyond the schema's technical specification.

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?

Clearly states 'Cancel the user's PayPal subscription' with a specific verb and resource. Distinguishes from sibling tools like amber_delete_account and amber_reactivate_subscription.

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?

Explicitly says when not to use (account deletion) and provides alternative tool. Also explains the asynchronous webhook behavior and the confirm parameter's role.

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