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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, and the description's 'Inspect' is consistent with those. It adds the 'history' qualifier, implying past deliveries rather than live state, but provides no further operational details like pagination, rate limits, or output volume. This aligns with annotations and adds modest context beyond them.

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?

The description is one short sentence, 'Inspect webhook delivery history,' with no filler or redundant words. It is front-loaded with the action verb and resource, making it maximally concise while still conveying core purpose.

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 no parameters and no output schema, the description provides enough information to invoke the tool successfully: it states the resource and that it returns historical delivery data. It does not specify the exact fields or format of the delivery history, nor whether it covers all webhooks or a specific one, but the tool's simplicity and strong annotations reduce the impact of this 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?

The input schema is empty with zero parameters, so there are no parameter semantics to explain. The description does not need to compensate for any schema gaps. The baseline for a no-parameter tool is 4, and this description fits that baseline.

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 ('Inspect') and clearly identifies the resource ('webhook delivery history'), which distinguishes it from webhook creation/revocation tools. It does not explicitly compare itself to sibling getter tools like get_events or get_monitor, but the 'delivery' qualifier narrows the scope adequately.

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 guidance on when to use this tool versus alternatives such as get_events or get_monitor, no mention of prerequisites, and no exclusions. The description simply states what the tool does without providing decision context.

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