create_webhook

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

Annotations provide no safety hints (all false). Description fully compensates by detailing side effect (validation GET), default behavior (all events/sources enabled if omitted), return format, and error condition on validation failure.

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?

Description is well-organized with clear sections (overview, side effect, args, returns). Each sentence adds value. Slightly verbose but still efficient; could be more concise by omitting the explicit enumeration of events/sources since they are listed in schema.

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?

Covers creation, side effects, defaults, and return value. Output schema exists but description adds detail (boolean flags for events/sources). Missing parameter 'account' is a gap. Compared to similar tools, this is quite thorough.

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 has 0% description coverage. Description explains 4 of 5 parameters (list_id, url, events, sources) with format, defaults, and valid values. Missing documentation for 'account' parameter, which is present in schema but not described.

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?

Clearly states it creates a webhook for audience event notifications. Distinguishes from sibling tools like create_batch_webhook by specifying audience events and explicitly advising against using for polling or batch data retrieval.

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?

Provides explicit usage context: when to use (audience event notifications) and when not to use (polling, batch data retrieval) with alternative tools listed. Also describes side effect (validation GET request) and prerequisite (publicly accessible URL returning 200).

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