// Introduced for KIP-700, DescribeClusterRequest is effectively an "admin"
// type metadata request for information that producers or consumers do not
// need to care about.
DescribeClusterRequest => key 60, max version 0, flexible v0+
  // Whether to include cluster authorized operations. This requires DESCRIBE
  // on CLUSTER.
  IncludeClusterAuthorizedOperations: bool

// DescribeClusterResponse is a response to a DescribeClusterRequest.
DescribeClusterResponse =>
  ThrottleMillis
  // The top level response error code.
  ErrorCode: int16
  // The top level error message, if any.
  ErrorMessage: nullable-string
  // The cluster ID that responding broker belongs to.
  ClusterID: string
  // The ID of the controller broker.
  ControllerID: int32(-1)
  // Brokers is a set of alive Kafka brokers (this mirrors MetadataResponse.Brokers).
  Brokers: [=>]
    // NodeID is the node ID of a Kafka broker.
    NodeID: int32
    // Host is the hostname of a Kafka broker.
    Host: string
    // Port is the port of a Kafka broker.
    Port: int32
    // Rack is the rack this Kafka broker is in, if any.
    Rack: nullable-string
  // 32-bit bitfield to represent authorized operations for this cluster.
  ClusterAuthorizedOperations: int32(-2147483648)