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

Annotations already declare readOnlyHint=false, idempotentHint=false, and destructiveHint=false, covering the safety profile. The description adds that the effect is an outbound re-send to the webhook URL, which is useful, but it does not warn that a non-idempotent retry can produce duplicate deliveries at the endpoint.

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, the action front-loaded and the parameter hint trailing. 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?

Adequate for a simple three-parameter mutation, but with no output schema and no annotations about side effects, the description omits what happens on success/failure and the duplicate-delivery risk implied by idempotentHint=false.

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 coverage is only 33%: site is documented while webhookId and historyId are not. The sentence 'Pass the webhook the delivery belongs to' adds real meaning for webhookId, but historyId's provenance is left implicit and neither field's format is clarified. It partially compensates for the coverage gap but not fully.

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 (re-sends) and resource (one delivery) and scopes it to a known source, get_webhook_history. An agent can distinguish this from test_webhook or get_webhook_history. It stops short of explicitly naming those siblings as alternatives.

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?

Implies usage by referencing get_webhook_history as the source of the delivery, so the workflow context is inferable. However, it never states when to retry vs. when to fall back to test_webhook, nor any preconditions such as the delivery needing to be in a failed state.

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