Here, we are going to explain how to install the JMX plugin into Eclipse.
JMX Tools is one module of the JBoss Tools project. JMX Tools has no dependency on any other part of JBoss Tools, and can be downloaded standalone. Even though the JMX Tools have no dependencies, other plugins, such as AS Tools, do depend on the JMX Tooling and even extend it.
You can find the JBoss Tools plugins over at the download pages. The only package you'll need to get is the JMX Tooling, however the AS Tools would give you a more full experience when using JMX with JBoss Servers. You can find further download and installation instructions on the JBoss Wiki in the InstallingJBossTools section.