Documentation for KeyWithPayload misleading

[CarstenLeue]

Documentation for the KeyWithPayload type says:

    /** Properties returned only for DELETE. */
    interface KeyWithPayload {
        /** Specifies the MIME type that represents the key resource. Currently, only the default is supported. */
        type?: string;
        /** The v4 UUID used to uniquely identify the resource, as specified by RFC 4122. */

What is meant by /** Properties returned only for DELETE. */? I see a data structure with some of the fields populated being returned by a createKey operation as well.