sap_cancel_subscription

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

The description lacks behavioral disclosure beyond 'cancel'. With no annotations, it should mention side effects (e.g., funds, reversibility) or required states. Currently, it provides no transparency about what happens after cancellation.

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 with no extraneous text, achieving high conciseness. However, it is slightly too minimal for the tool's complexity, front-loading the core action but lacking supporting details.

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 no output schema and no annotations, the description is incomplete. It does not explain return values, side effects, or how it relates to sibling tools like sap_create_subscription. A more comprehensive description is needed for an agent to use the tool correctly.

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% and the description adds no additional meaning beyond the parameter names and their schema descriptions. The baseline of 3 is appropriate as the description does not enhance understanding of the parameters.

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 'Cancel a recurring subscription' clearly states the verb (cancel) and resource (recurring subscription), distinguishing it from other subscription-related siblings like create, fund, fetch. It is specific but could mention the effect more explicitly.

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 guidance on when to use this tool versus alternatives. While there is only one cancel tool, there is no mention of prerequisites, such as the subscription being active, or when not to use it (e.g., if already cancelled).

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