For example
https://musicbrainz.org/ws/2/recording?work=06ba8e8e-604c-4a9e-a0da-e150a75b739a

<?xml version="1.0" encoding="UTF-8"?><error><text>Must specify a least one parameter (other than 'limit', 'offset' or empty 'query') for collections query.</text><text>For usage, please see: http://musicbrainz.org/development/mmd</text></error>

An error is expected since browsing recordings by work is not supported yet (even though it should probably be... that is a separate issue), but the message should not point to collection, it should either mention that work is not supported and/or give a complete list of supported query fields.