send_test_alert_email

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

With no annotations, the description carries the full burden and does meaningful work: it discloses the recipient is fixed to the verified address, that exactly one message is sent, and that a 409 is returned when no verified email exists. It omits whether authentication/plan prerequisites apply and whether the send is rate-limited or recorded in alert events.

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, zero filler, with the core action and recipient scope front-loaded and the error condition placed last as a secondary caveat.

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?

An output schema exists and there are no parameters, so the description only needs to cover behavior and failure modes — which it does via the verified-address constraint and the 409 case. A note on auth requirements or side effects (e.g. whether an alert event is logged) would make it fully 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 tool takes zero parameters, so the baseline is 4. The description correctly implies no inputs are needed while clarifying that the destination address is derived from the account rather than supplied by the caller.

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 names a specific verb and resource ('Send one test alert email') and adds scope ('to the account's verified address') plus intent ('so the person sees what an alert looks like'), which separates it from sibling mutation tools like create_alert or list_alerts without needing the schema opened.

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 phrase 'so the person sees what an alert looks like' clearly signals the use case: previewing/demoing an alert rather than configuring one. It stops short of naming an explicit alternative (e.g. create_alert) or saying when not to call it, so it is a clear context rather than a full routing rule.

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