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

Annotations already declare openWorldHint=true, destructiveHint=false and non-idempotent, so the safety profile is covered. The description reinforces the open-world nature by saying it delivers a sample event to an external URL, but says nothing about how failure is surfaced, whether the test is logged/recorded on the webhook, or retry behavior — meaningful context for a delivery tool that the annotations cannot express.

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 tight sentence with zero filler and the purpose front-loaded. It is appropriately sized, though the brevity is partly the source of the missing parameter guidance.

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?

With six parameters, only one-third schema coverage, no output schema, and two distinct invocation modes, the description should explain what a successful test returns and how the optional parameters interact. It leaves the agent to infer all of that from an incomplete schema.

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 description coverage is only 33%, and the description adds no parameter meaning at all. Only `type` and `webhookId` carry schema descriptions; `secret`, `eventTypeId` and `payloadTemplate` are undocumented in both places, and the crucial exclusive choice between supplying `url`+`type` and `webhookId` is never explained.

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?

States a specific verb and resource ('Send a sample event to a webhook URL') plus the goal ('check that it receives and accepts deliveries'), which clearly separates it from create_webhook, list_webhooks and update_webhook by the 'test' intent. It does not explicitly name an alternative sibling, but the intent is unambiguous.

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?

Usage is implied by 'to check that it receives and accepts deliveries', which tells the agent this is diagnostic, non-production traffic. However it never states when to prefer this over inspecting a webhook with get_webhook, nor does it distinguish the two calling modes the schema allows (raw url+type vs a saved webhookId).

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