Dispatch a native OS notification.

Use this tool whenever the user asks to be notified, for example:

• "notify me when done"

• "ping me when finished"

• "let me know when you're done"

• "send me a notification when complete"

Args: title: Short title for the notification (e.g. "Task finished"). message: Body text explaining what happened (e.g. "Your download is ready"). urgency: Notification priority: "low", "normal" (default), or "critical". sound: Whether to play an audible alert alongside the notification. timeout: Number of seconds before the notification auto-dismisses. -1 means use the OS default. token: Optional stable identifier for this notification. Reusing the same token replaces the previous notification instead of creating a new one. mobile: Also send to configured mobile backends (ntfy.sh, Telegram, Pushover).

Returns: A dictionary with the scheduled notification id, success flag, and details of any mobile dispatch attempts.

Alias for dispatch_os_notification. Send a native OS notification.