I suggest changing the help text from:

This plugin can be used to search for some text using regular expressions on a set of files. For example, it can be used to search for the string "failure" in a set of log files.

to

This plugin can be used to downgrade a successful build to "unstable" or "failure" if a regular expression matches in a set of files.
For example, it can be used to search for the string "failure" in a set of log files.