CreateAlarmTool

Creates a clock alarm by firing an AlarmClock.ACTION_SET_ALARM intent at the system clock app (with EXTRA_SKIP_UI, so no UI is shown). Optional message label and days (comma-separated mon..sun) for a repeating alarm; omit days for a one-time alarm.

On Android 10+ the intent can only be delivered while the host app is in the foreground or holds SYSTEM_ALERT_WINDOW; otherwise the platform silently blocks the launch, so the tool returns an error up front (see ActivityLaunch.canStartActivity).

Requires the com.android.alarm.permission.SET_ALARM permission (declared in the manifest; a normal install-time permission). Listing existing alarms is not possible via any standard API; GetNextAlarmTool reports only the next one.

Result keys: success, hour, minute, message, days.