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

Goes beyond the annotations by disclosing a redaction policy: authentication data, custom header values, and the endpoint's path and query are hidden because they can hold secrets. That is genuinely useful behavioral context an agent cannot infer from readOnlyHint/destructiveHint. It stops short of describing ordering, result limits, or empty-result behavior.

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 sentences, front-loaded with what is returned, followed by the redaction caveat and the read-only guarantee. Every sentence carries distinct information and nothing is repeated from the title.

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 output schema, the description compensates by naming the returned fields, documenting what is masked, asserting read-only semantics, and citing the underlying endpoint. An agent has everything needed to call this and interpret the result correctly.

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 tool takes zero parameters, so there is nothing for the description to disambiguate and the baseline is 4. The description correctly avoids inventing filters or paging arguments that the schema does not have.

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 the webhooks registered for the organization') and enumerates the fields returned (name, endpoint host, method, status). No sibling tool deals with webhooks, so the scope is unambiguous at a glance.

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?

Explicitly scopes the tool as read-only and states 'this server does not create or change webhooks', which tells the agent there is no mutation alternative to look for. It doesn't compare against other list tools, but for a zero-param listing tool with no near-sibling this is clear guidance.

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