JavaDoc that makes my head hurt

I found the following javadoc in our source code. It makes my head hurt.

/**
 * Marker interface that marks an executor as a refresh field definitions query executor,
 * i.e. a query executor that refreshes the field definitions.
 */
public interface RefreshFieldDefinitionsQueryExecutor {
}

It repeats the same thing at least three times, twice in the comments and once in the name of the marker interface.

And still I am no closer to understanding what it does.