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

With no annotations, the description carries full burden. It discloses the action (POST), the expected result field (webhook_last_status), and a security warning ('Do not dump Authorization'). It implies the webhook must already exist. However, it does not explain side effects, error behavior, or the role of the token parameter, which are minor gaps for a test tool.

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 concise sentences, front-loading the primary action and then providing a result-checking hint and a security warning. There is zero wasted wording, and the most important information is presented first.

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?

The tool is simple (one optional param, no output schema), and the description covers the main action and result. However, the token parameter is completely unexplained, and the description does not clarify what constitutes a 'sample event' or any preconditions beyond having set a webhook. This is a notable omission for an agent to call it 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 schema has one parameter 'token' with no description, and the tool description never mentions it. Schema coverage is 0%, and the description provides no hint about what the token represents (e.g., webhook ID, auth token). An agent would not know what value to pass, making this a critical gap.

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: 'POST a sample event to the webhook you already set.' It identifies a specific verb (POST), resource (webhook), and context (existing webhook), distinguishing it from siblings like set_webhook (creation) and other messaging tools. The purpose is unambiguous.

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 implies the tool is for testing an already-configured webhook, which provides clear context and differentiates from set_webhook (creation). It also hints at usage by instructing to 'Check webhook_last_status in the result,' but it does not explicitly state when not to use it or name alternatives. This is clear context without exclusions.

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