You are responsible for overseeing and directing the work of your Tasker. Taskrabbit doesn't monitor, direct, or oversee the work of Taskers, as they are independent contractors hired by Clients. If you won't be home, be sure to give your Tasker any instructions they may need to correctly complete your task.
If you fail to do so, your Tasker may attempt to get that information from you through the task's chat thread.