diff --git a/server/etcdmain/grpc_proxy.go b/server/etcdmain/grpc_proxy.go
index e88941465..85233f0b5 100644
--- a/server/etcdmain/grpc_proxy.go
+++ b/server/etcdmain/grpc_proxy.go
@@ -141,9 +141,9 @@ func newGRPCProxyStartCommand() *cobra.Command {
 	cmd.Flags().BoolVar(&grpcProxyInsecureDiscovery, "insecure-discovery", false, "accept insecure SRV records")
 	cmd.Flags().StringSliceVar(&grpcProxyEndpoints, "endpoints", []string{"127.0.0.1:2379"}, "comma separated etcd cluster endpoints")
 	cmd.Flags().DurationVar(&grpcProxyEndpointsAutoSyncInterval, "endpoints-auto-sync-interval", 0, "etcd endpoints auto sync interval (disabled by default)")
-	cmd.Flags().DurationVar(&grpcProxyDialKeepAliveTime, "dial-keepalive-time", 0, "after a duration of this time if the client doesn't see any activity it pings the server to see if the transport is still alive (0 to disable).")
-	cmd.Flags().DurationVar(&grpcProxyDialKeepAliveTimeout, "dial-keepalive-timeout", embed.DefaultGRPCKeepAliveTimeout, "after having pinged for keepalive check, the client waits for a duration of Timeout and if no activity is seen even after that the connection is closed (default 20s).")
-	cmd.Flags().BoolVar(&grpcProxyPermitWithoutStream, "permit-without-stream", false, "if true, client sends keepalive pings even with no active RPCs. if false, when there are no active RPCs, Time and Timeout will be ignored and no keepalive pings will be sent (default false).")
+	cmd.Flags().DurationVar(&grpcProxyDialKeepAliveTime, "dial-keepalive-time", 0, "keepalive time for client(grpc-proxy) connections (default 0, disable).")
+	cmd.Flags().DurationVar(&grpcProxyDialKeepAliveTimeout, "dial-keepalive-timeout", embed.DefaultGRPCKeepAliveTimeout, "keepalive timeout for client(grpc-proxy) connections (default 20s).")
+	cmd.Flags().BoolVar(&grpcProxyPermitWithoutStream, "permit-without-stream", false, "if true, client(grpc-proxy) sends keepalive pings even with no active RPCs (default false).")
 	cmd.Flags().StringVar(&grpcProxyAdvertiseClientURL, "advertise-client-url", "127.0.0.1:23790", "advertise address to register (must be reachable by client)")
 	cmd.Flags().StringVar(&grpcProxyResolverPrefix, "resolver-prefix", "", "prefix to use for registering proxy (must be shared with other grpc-proxy members)")
 	cmd.Flags().IntVar(&grpcProxyResolverTTL, "resolver-ttl", 0, "specify TTL, in seconds, when registering proxy endpoints")