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

Goes well past the annotations: it explains exactly what is cleared (Lock Screen and Notification Center on every device), that notification history is retained (softening the destructiveHint=true framing), that iOS/iPadOS clearing is asynchronous, and that a success result means the dismissal was recorded rather than propagated. It also discloses the pre-1.17.0 fallback behavior and idempotency, all of which an agent could not infer from the annotations.

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 core action and identifier source are front-loaded, then device behavior, result semantics, and edge cases follow in a sensible order. Four paragraphs is on the long side, and the legacy app-version caveat is the one passage an agent is least likely to need.

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 single-parameter mutation with an output schema already available, the description covers the remaining gaps an agent would care about: asynchronous propagation, what a success result actually guarantees, idempotency, and the irreversibility of the dismissal. Nothing needed to invoke it correctly 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 coverage is 100% and the single parameter already documents that it is the notification_id returned when the notification was sent. The description reinforces the provenance but adds no format, validation, or edge-case detail beyond the schema, so the baseline 3 applies.

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?

Opens with a specific verb and resource ('Dismiss a Push Notification that was already sent') and ties the identifier to its origin, send_push_notification. That makes it immediately distinguishable from the sibling write tools send_push_notification and replace_push_notification.

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?

Gives a concrete when-to-use condition ('when a notification no longer needs attention, for example after a question you asked was answered somewhere else') and states that repeat calls are safe. It implies but never explicitly names replace_push_notification as the alternative for updating content, since 'a dismissed notification cannot be replaced' only hints at it.

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