this was also the problem with WSDL and REST itself, and so on. of course there are things that make sense to be in-band .. but there are things that have to be communicated out-of-band (just as REST doesn't say anything about what to do with a specific content type OpenAPI and GraphQL doesn't worth much with empty description fields, though I'd argue still much better than getting a .doc file named API_doc-Finalv2(1) :) )