The @Property annotation is used to within other annotations such as @NameTemplate or @NamingContext. It should be seen as a structural way for a list of properties. A property is made of a key and a value. The value can either be a string litteral or it can be surrounded by curly brace to be a dynamic property. A dynamic property is resolved against the instance of the object at runtime.
The @NameTemplate defines a template that is used at registration time of a managed object to create the JMX object name. The template is formed of properties.
The @NamingContext annotations defines a set of properties which are used within a management context. It allows to propagate properties down to managed objects which are defined by an object implementing the ManagementAware interface. The goal is to scope different instances of the same class that would have the same object name otherwise.