As of API version 2022-07 all GraphQL schemas will start using the "@deprecated" directive for input fields and arguments which have been deprecated. API versions 2022-04 and below will continue to use the description for deprecation warnings.
It is recommended you use a GraphQL client which supports deprecated input fields and arguments when using GraphQL API versions 2022-07 and above. For example graphql-js added support as of version v15.5.0. See the official GraphQL spec for more details.