webhook_allowlist_add

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

With no annotations provided, the description must disclose behavioral traits, but it only states the verb 'allowlist'. It does not mention whether the operation is idempotent, reversible, requires special permissions, or has side effects like modifying persistent configuration. The description is too minimal to give the agent confidence in the tool's 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?

The description is a single, efficient sentence with no unnecessary words. The action and resource are front-loaded, and the parenthetical example adds clarity without bloating the text.

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 simple one-parameter tool with no output schema, the description provides the core purpose and parameter format. However, it lacks information about the effect of the operation, whether it can be safely repeated, or any error conditions. Given the simplicity, it is adequate but could be more complete.

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 schema only defines 'url_prefix' as a string with no description, so the description is essential. It adds meaning by specifying that the value is a URL prefix and gives acceptable schemes (https webhooks/redirects or cursor:// deep links). This goes beyond the schema and clarifies the expected format and scope.

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 clearly states the action ('Allowlist') and the resource ('a callback URL prefix'), and it provides concrete examples of valid URL schemes (https webhooks/redirects or cursor:// deep links). This makes the tool's purpose immediately understandable and distinct from sibling tools that handle login, billing, or integration management.

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 explicit guidance on when to use this tool versus alternatives. It does not mention prerequisites, exclusions, or other tools to consider. The only context is the action itself, which implies usage for allowlisting URL prefixes, but there is no explicit routing or conditional guidance.

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