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

The description states the primary side effect ('Send a test event') and the return payload ('HTTP status code and success/failure message'), which adds behavioral context beyond the annotations. It does not elaborate on edge cases or whether the event is delivered to the live endpoint, but the core behavior is clear.

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, with the action and purpose front-loaded before the return value. Every clause contributes information; no filler or repetition.

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 test action with full schema coverage, the description covers what the tool does, why to use it, and what it returns. No output schema exists, and the description supplies the return behavior; nothing critical is missing for correct invocation.

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 input schema fully documents the single id parameter as 'Webhook subscription ID' (100% coverage), so the description does not need to add parameter-level detail. The description provides no additional parameter semantics, matching the baseline for high schema coverage.

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 ('send') and resource ('test event') with a clear objective ('verify webhook connectivity'), making the tool's function unambiguous. This clearly differentiates it from sibling webhook subscription tools (get/list/save/delete), which manage subscriptions rather than test them.

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 'to verify webhook connectivity' establishes a clear use case: when an agent needs to confirm a subscription's endpoint is reachable. It does not explicitly name alternatives or exclusions, but the tool's role is apparent among the webhook_subscriptions siblings.

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