CreateTimerTool

Creates a countdown timer by firing an AlarmClock.ACTION_SET_TIMER intent at the system clock app (with EXTRA_SKIP_UI, so no UI is shown). Takes a positive seconds duration and an optional message label.

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).

Result keys: success, seconds, message.