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

Beyond the destructiveHint annotation, the description adds significant behavioral context: it restricts scope to the caller's own destinations, forbids arbitrary recipients or content, and specifies idempotency behavior for request_id after an unknown response. It does not explain why the tool is marked destructive or what side effect that entails, keeping it from a 5.

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 front-loaded with purpose and then supplies usage, idempotency, and scope constraints in a compact sequence. The final sentence slightly restates the no-arbitrary-recipient constraint already implied earlier, but overall it is efficient.

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 one-parameter tool with no output schema, the description covers the critical invocation context: trigger conditions, recipient scope, idempotency, and prohibited inputs. It does not mention the confirmation flow or how this relates to confirm_chat_notification_test, which is a minor gap.

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 0%, so the description carries the burden for the single request_id parameter. It does so well: it identifies the parameter, says it must be stable, and explains reuse after an unknown response with a prohibition on retrying with a new ID.

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: sending a notification test to the user's own currently selected destinations. It clearly distinguishes this from a general send by ruling out arbitrary recipients, content, and subscriptions, though it does not explicitly name the confirm/get notification-test siblings.

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?

It gives explicit when-to-use guidance ('only when the person explicitly requests a self-test') and when-not-to-use guidance ('Never invoke automatically when a notification arrives'). It does not name alternative tools such as confirm_chat_notification_test or get_chat_notification_tests, so it falls short of full alternative routing.

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