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

With no annotations, the description carries the full burden. It implies a read-only operation and discloses that delivery status is included, but says nothing about pagination, ordering, scope (account vs project), freshness of the delivery status, or result shape for zero-delivery webhooks.

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. It is efficient, though slightly terse to the point of leaving key behavior unspecified.

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 zero-arg, no-annotation list tool with no output schema, the scope and return contents are only partially conveyed: the agent knows it returns webhooks plus delivery status but not pagination, ordering, or whether delivery status may be stale/missing. Adequate but with clear gaps.

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?

Zero parameters, so there are no semantics to explain; the tool takes no arguments and the description correctly discusses no inputs rather than leaving an ambiguity.

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 clear verb+resource: lists the account's webhooks with their last delivery status. The delivery-status detail distinguishes it from a plain enumeration and hints at the sibling webhooks.test/webhooks.add, though it never names alternatives explicitly.

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?

No when-to-use guidance, no mention of alternatives such as webhooks.test for delivery checks, and no prerequisites. The agent must infer this is the read/list counterpart to webhooks.add and webhooks.remove.

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