To list the tags for a log group, use ListTagsLogGroup. To add tags, use UntagLogGroup.
public UntagLogGroupResponse UntagLogGroup(UntagLogGroupRequest request) { var marshaller = new UntagLogGroupRequestMarshaller(); var unmarshaller = UntagLogGroupResponseUnmarshaller.Instance; return Invoke<UntagLogGroupRequest,UntagLogGroupResponse>(request, marshaller, unmarshaller); }