If you are going to work with JBoss middleware, you will need to learn how to navigate the JBoss web site. Starting from http://www.jboss.org, hover your mouse over the Projects tab at the top of the page. That pops up a menu, move you mouse down the menu to Tools & Testing, which opens another menu, click on Tools in that menu. That takes you to the JBoss Tools home page. (Of course, you can also Google "JBoss Tools", but like i wrote, you need to learn to navigate the JBoss web site.)
There are two important links on Jboss Tools home page:
1) Download & Updates takes you to a page that tells you how to install JBoss Tools into Eclipse.
2) Documentation takes you to a page about documentation. If you click on References, there are directories for documentation specific to various versions of Tools. Click the latest GA link (e.g 3.2.1.GA). That takes you to a page containing links for the various documents. The documents are very good and extensive. The Tools developers do a good job documenting how the tools works and provide many examples to help you get started.