It calls itself a random *password* function.  That puts it directly in the security domain, by promising this is a random string *suitable for use as a password*.

In that universe this might be used to, eg, secure a database, or root access, or something else, because a user legitimately assumed "suitable for a password" == "sufficiently secure".

Also, I continue to be puzzled by your statement that this is a "one-off case", since this function will return a different result on every Puppet run, even if it has been evaluated previously.