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

Goes meaningfully beyond the annotations by disclosing a non-obvious side effect: the webhook is re-enabled, not just retried. Combined with openWorldHint=true and idempotentHint=false, the agent can infer external HTTP calls will be re-fired. It still doesn't say what happens on partial failure or whether already-successful deliveries can be duplicated.

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 sentence, front-loaded with the action and scope, with the secondary state change ('re-enable') stated compactly. No filler.

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 simple one-parameter mutation with full schema coverage and populated annotations, the description covers the key unknowns (bulk retry plus webhook re-enablement). No output schema exists, and the description doesn't say whether it reports how many deliveries were retried or how partial failures surface, which is the remaining gap.

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?

Only one parameter and schema coverage is 100%, with the wh_xxx format documented in the schema itself. The description adds no meaning beyond identifying the target as 'a webhook'; baseline 3 applies since the schema carries the load.

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 with scope: 'Send every failed delivery of a webhook to its URL again'. The word 'every' implicitly contrasts with the singular sibling retry-webhook-request, but the sibling is never named, so differentiation requires inference from the tool name.

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 'every failed delivery' implies the situation (bulk recovery after delivery failures), but there is no explicit when-to-use or when-not guidance and no mention of the sibling retry-webhook-request for single-delivery retries. Usage has to be inferred.

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