-<p>Replace <<var>tags</var>> with one or more usertags. Separate
-multiple tags with commas, spaces, or both.</p>
+<p>Replace <<var>usertags</var>> with one or more usertags.
+Separate multiple tags with commas, spaces, or both. If you specify a
+username, that users tags will be set. Otherwise, the email address of
+the sender will be used as the username</p>