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

Annotations already declare readOnlyHint, idempotentHint and destructiveHint=false, so the safety profile is covered. The description adds genuinely new behavioral information: signing secrets and delivery payloads are redacted in the response, which tells the agent it cannot retrieve those fields here. Pagination behavior remains unstated.

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 front-loaded sentence with zero filler; the scope and the redaction caveat are packed into one efficient line.

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?

An output schema exists so return values needn't be explained, and annotations cover the safety profile. However, the sole parameter is undocumented anywhere, and there is no hint of whether results are paged or how to fetch further pages — a real gap for a list tool with a pageSize input.

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?

There is one parameter (pageSize) and schema description coverage is 0%, so the description carries the burden of documenting it — but it never mentions pagination, page size, or any bounds. The agent learns nothing about the only input beyond the raw schema, and no default/maximum behavior is contextualized.

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 (Lists) and resource (webhook endpoints) scoped to the authenticated user, which clearly separates it from the create/update/delete webhook siblings. It does not explicitly name an alternative, but the operation is unambiguous.

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?

Usage is only implied by the verb 'Lists'; there is no statement of when to call this versus siblings like update_webhook_endpoint or delete_webhook_endpoint, nor any prerequisite or exclusion. Acceptable for a simple listing tool but adds no routing guidance.

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