Download from http://dl-ssl.google.com/android/repository/tools_r22-windows.zip, unzip it and replace the /tools folder with this one to downgrade the sdk tools. There's a bug in version 22.
For Mac http://dl-ssl.google.com/android/repository/tools_r22-macosx.zip
For Linux: http://dl-ssl.google.com/android/repository/tools_r22-linux.zip