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

The description is otherwise rich, disclosing 30-second 2xx wait, sample payload characteristics, and the 30-test/hour limit. However, it contradicts the idempotentHint=true annotation: the sample uses random ids and each call consumes quota, so repeated identical calls produce different payloads and side effects. This is an Annotation Contradiction.

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 compact and front-loaded with the core behavior, then adds mode distinction, response reporting, payload notes, rate limit, cost, and a conditional parameter in a logical order. Every sentence earns its place without redundancy.

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 six optional parameters fully described in the schema, an output schema present, and annotations provided, the description still adds the critical runtime context: response expectation within 30 seconds, rate limit, non-reproduction of multi-language fan-out, and website_id guidance. Nothing an agent needs for correct invocation 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 the parameters are already well documented in the schema. The description adds only lightweight context such as the website_id condition, but does not materially improve on the schema's parameter meanings. Baseline 3 is appropriate.

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 states a specific action and resource: it sends a sample article payload to a webhook, and clearly distinguishes testing the connected webhook from testing an unconnected endpoint via url. It also clarifies that it is a pre-connection test, which separates it from the sibling connect_custom_webhook.

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 clear when-to-use guidance for both modes: omit url to test the saved webhook, or pass url to test before connecting. It also explains when website_id is needed and points to get_account. It does not explicitly name sibling alternatives like connect_custom_webhook, so it stops short of full exclusion guidance.

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