you can download them separately from:
sdk tools: http://dl.google.com/android/repository/tools_r22.0.5-windows.zip
platform-tools: http://dl.google.com/android/repository/platform-tools_r18.0.1-windows.zip
Pregunta
After update my SDK tools and platform-tools folders disappeared of my SDK
My SDK directories Tree https://gist.github.com/LuizCarvalho/6870443 And My Android SDK folder
Solución
you can download them separately from:
sdk tools: http://dl.google.com/android/repository/tools_r22.0.5-windows.zip
platform-tools: http://dl.google.com/android/repository/platform-tools_r18.0.1-windows.zip
Otros consejos
The Platform Tools is now seperated. Open the SDK Manager and download "Android SDK Platform-tools" at the top in the Tools folder.
Go to Window -> SDK Manager. Re-download what you're missing.