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

The description adds behavioral context beyond annotations: it sends a test payload and returns delivery status and HTTP response code. Since annotations already declare readOnlyHint=false, destructiveHint=false, the description's mention of a test action with non-destructive consequences is appropriate and adds value.

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 two sentences, no filler, and front-loaded with the core action. Every word is necessary and informative.

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 tool with one parameter and no output schema, the description is complete: it explains the action, the return value (delivery status and HTTP code), and the parameter is fully described in the schema. Annotations provide additional safety context.

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 coverage is 100% with one parameter (webhook_id) described as 'The webhook ID to test (from list_webhooks)'. The description mentions 'webhook endpoint' but adds little beyond the schema. Baseline 3 is appropriate since the schema already fully documents the parameter.

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 tool's action: sending a test payload to a webhook endpoint to verify event reception. It names the specific verb 'send' and resource 'test payload', and distinguishes from sibling tools like create_webhook (creation) and list_webhooks (listing).

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 indicates the tool is used to verify that a webhook receives events correctly, providing clear context. However, it does not explicitly state when not to use it or suggest alternatives, such as checking webhook configuration via list_webhooks before testing.

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