WatchNotificationsTool

Registers a filter against the live notification stream in WatchRegistry, returning a watch_id for later ListNotificationWatchesTool / UnwatchNotificationsTool calls. Requires the listener service bound and notification listener access granted, else notification_listener_not_enabled. At least one of package_name (exact match), sender_pattern (substring on title), or keyword (substring on text/bigText/subText/ ticker) is required — supplying none is invalid_filter; supplying several AND-combines. All string matching is case-insensitive. ttl_seconds (clamped 60-86400, default 3600) auto-expires the watch; fire_on_update (default false) controls whether subsequent updates to an already-matched notification key fire again. Output: watch_id, expires_at, the effective ttl_seconds, and fire_on_update.