Currently, at this place and in this failure path before there is no point where any `request.errors` had been established. But yes, i would propose **making** one up at this place. But let's do it for "406 Not Acceptable" as well as "415 Unsupported Media Type" then. FYI: At the moment the response body for "406 Not Acceptable" just returned a plain JSON list containing the acceptable egress content types. I would very much favor returning a more detailled and descriptive `request.errors` response body at this place.