{
				Kind: &metadata.MetadataKind{Kind: &metadata.MetadataKind_Host_{}},
				Name: util.OriginalDstMetadataKey,
			},
			{
				Kind: &metadata.MetadataKind{Kind: &metadata.MetadataKind_Cluster_{
					Cluster: &metadata.MetadataKind_Cluster{},
				}},
				Name: "istio",
			},
			{
				Kind: &metadata.MetadataKind{Kind: &metadata.MetadataKind_Host_{
					Host: &metadata.MetadataKind_Host{},

	return &tracing.CustomTag{
		Tag: name,
		Type: &tracing.CustomTag_Metadata_{
			Metadata: &tracing.CustomTag_Metadata{
				Kind: &envoy_type_metadata_v3.MetadataKind{
					Kind: &envoy_type_metadata_v3.MetadataKind_Request_{
						Request: &envoy_type_metadata_v3.MetadataKind_Request{},
					},
				},
				MetadataKey: &envoy_type_metadata_v3.MetadataKey{