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

The annotations already declare destructive, idempotent, non-read-only, and closed-world behavior. The description adds meaningful context beyond them: deletion is permanent, only owned notifications can be deleted, missing or foreign IDs return not found, and success yields null.

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 three compact sentences, front-loads the destructive action and scope, and contains no redundant or wasted phrasing.

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 destructive tool with annotations and an output schema, the description covers the essential behavior: permanence, ownership, not-found handling, and success shape. The main remaining gap is the lack of explicit routing to the bulk delete sibling.

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?

There is only one parameter and schema description coverage is 0%, so the description must carry weight. It names notificationId and adds ownership and not-found semantics, but it does not explain the required ID format beyond what the schema pattern already provides.

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 verb and resource: permanently delete a notification. It also narrows scope to one owned notification, which distinguishes it from the sibling deleteNotifications bulk operation.

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 single-notification scope implies when to use this tool, but the description never names the alternative deleteNotifications or explicitly explains when to choose one over the other. The missing/foreign ID behavior is useful but is not usage guidance.

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