Trigger an automation from an external system

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

The description adds meaningful behavior beyond the annotations: the endpoint is unauthenticated by design, the token in the path is the credential, and comparisons happen in constant time. It does not describe side effects or response behavior, but it substantially clarifies the security model.

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 sentences, each earning its place: one defines purpose and scope, the other defines the security model. The description is front-loaded and contains no filler or redundancy.

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 webhook-style trigger, the description covers purpose, external usage, and authentication. However, it omits the expected response, error behavior, token origin, and explicit differentiation from the internal trigger alternative, leaving some operational context unclear.

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 zero description for the token parameter, so the description carries the full burden. It adds critical semantics: the token is 32 bytes, lives in the path, acts as the credential, and is compared against a stored hash. It does not explain how the token is obtained, but it makes the opaque parameter actionable.

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 specific action ('Trigger an automation') and a clear scope ('from an external system'). It is distinct enough from the surrounding automation-management siblings, though it does not explicitly differentiate itself from run_automation_now.

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 conveys when this tool is appropriate: external callers, no authentication, token as credential. However, it never names alternatives or states when not to use it, so the usage guidance is implied rather than explicit.

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