ncloud_sens_cancel_sms_reservation

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

Beyond the annotations (destructiveHint: true, idempotentHint: true), the description adds the critical confirm=true requirement to execute, and discloses the 204 success response. This is exactly the behavioral context an agent needs and is not present in 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?

A single sentence with the destructive warning front-loaded, then the action, endpoint, and execution requirement. No wasted words; every element earns its place.

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?

For a destructive cancel operation, the description covers the action, the confirm gate, and the response code. No output schema exists, but the 204 is mentioned. The agent has everything needed to invoke 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 each parameter already has a descriptive comment. The description adds minimal extra parameter insight beyond reiterating the confirm requirement. Baseline 3 is appropriate since the schema carries the semantic weight.

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 states a clear verb ('Cancel') and specific resource ('scheduled SMS request') with the HTTP endpoint. It clearly distinguishes from the sibling ncloud_sens_cancel_alimtalk_reservation by specifying SMS. The 'before it is sent' qualifier adds precision.

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 implies usage: cancel a scheduled SMS that hasn't been sent. It doesn't explicitly name alternatives or exclusions, but the tool name and 'before it is sent' make the context clear. No explicit 'when not to use' guidance, but sufficient for a single-purpose cancel action.

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