Tool TL;DR has several roles which combine multiple permissions.
Your edits as an Anonymous user will show your public IP address to the masses. If you don't want that, you can make an account where it will become hidden forever.
As a User, you get a username, you can talk about yourself in an 'about me' section, and get your public IP address hidden.
As a Member, you can move pages around. This includes both tools and categories and serves to help organize the site's content and find the best fit for information.
Right now, Time Travelers can click a button on an edit and instantly revert the page state to a previous edit. This isn't a cumulative edit nor does it destroy intermediate edits. It simply makes a new time travel edit with the same contents of the destination edit. More moderater-y permissions will be added in the future.