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

Annotations already declare this is a non-readonly, non-destructive, non-idempotent, open-world write. The description adds nothing beyond that: it does not mention the secret_token authentication requirement, whether the URL must be reachable, or what happens on duplicate registration.

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?

One short front-loaded sentence with no filler, so nothing wastes space, but it is under-specified rather than concise. Brevity here comes at the cost of all routing and behavioral detail.

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, so return values need not be explained. However, for a write tool with four all-optional parameters and no annotations about permissions or side effects, the description should at minimum indicate required inputs and auth behavior; it supplies none of this.

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 100%, so the schema already documents url, sources, triggers, and secret_token, making 3 the baseline. The description adds no meaning, and notably does not clarify that all four parameters are optional (required is empty), which is non-obvious for a 'create' tool.

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 verb 'Creates' and resource 'webhook listener' are stated, but the sentence essentially restates the tool name (create_webhook) with no scoping detail. It does not distinguish itself from update_webhook, delete_webhook, or list_webhooks beyond the verb.

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?

There is no when-to-use guidance, no mention of the alternative update/delete/list webhook siblings, and no prerequisites. The agent gets no signal about when creating a webhook is the right action.

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