cancel_scheduled_email

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

With no annotations, the description carries the burden. It discloses the key behavioral constraint (status must be 'scheduled') and the timing window, but does not mention side effects such as irreversibility, permissions, or what happens when the status is not scheduled.

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 short sentences, front-loaded with the action and resource, with no wasted words. The status constraint is placed in the second sentence, keeping the primary purpose first.

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 one-parameter cancellation tool the description covers purpose and precondition, but because there is no output schema or annotation and the parameter semantics are not elaborated, the agent is left to guess at identifier semantics and expected outcomes beyond success/failure. It is adequate but not complete.

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?

The schema provides only a bare string property with no description, and schema description coverage is 0%. The description does not explicitly state that id is the scheduled email identifier or where to obtain it, so the agent must infer this from the tool name.

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 ('Cancel') and resource ('scheduled email'), and adds the temporal qualifier 'before it sends.' This clearly distinguishes it from send/list/update siblings and leaves no ambiguity about its function.

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 status constraint 'Only works while status is scheduled' gives an explicit precondition for use and implicitly tells an agent not to call it for emails that are already sent or in draft. It does not name alternatives, but among siblings there is no direct alternative for this operation.

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