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

Annotations already declare readOnlyHint=true, so the safety profile is covered. The description adds two pieces of behavioral context beyond the annotations: that results are page-paginated and the underlying endpoint (GET /webhooks). It does not describe defaults, ordering, or empty-result behavior, so it is adequate but thin.

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?

Three short fragments with zero waste, and the core purpose is front-loaded in the first sentence. The endpoint note is slightly redundant with the tool name but is cheap and useful for tracing to the API.

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 read-only paginated list with no output schema and 0 required parameters, the description covers the essentials: what it returns, that it paginates, and which API call it maps to. Nothing an agent needs in order to invoke it correctly is missing.

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 page and limit are already fully documented in the schema, and the baseline is 3. The description's 'Page-paginated' note reinforces the pagination model but adds no syntax or default detail beyond what the schema provides.

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 ('List configured webhooks'), which is unambiguous and distinguishes it from the other list_* siblings that target different resources (groups, campaigns, subscribers). It stops short of explicitly naming a sibling, but the resource is narrow enough that confusion is unlikely.

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 description gives no when-to-use or when-not-to-use guidance and names no alternatives; the agent must infer that this tool is the only webhook-listing option. It is a simple read tool so the risk is low, but no usage context is provided.

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