The real 'power' in Tube Toolbox is in its ability to automate tasks. For exmaple, you can set Tube Toolbox to send Friend Requests out all night while you're alseep.
What tasks can Tube Toolbox automate?
Tube Toolbox offers a robust recipient-selection tool. This feature allows you to send to your Friends, Subscribers, any other group of users you have created, exclude users you have already sent to as well as combine results if you are using more than 1 YouTube account on your computer.
Tube Toolbox allows you to set filter conditions and automated tasks are skipped on a per-user basis if the user does not meet the criteria that you set.
While Tube Toolbox performs an automated task, you get instant feedback showing you how many items have been sent, how many have failed (for example if the user blocks comments), who is coming up next, and when you have reached YouTube's sending limits (at which point Tube Toolbox waits for the restriction to go away and then continues sending again).