Updating SDK 2.3 - what exactly are the SDK Platform tools?

I wish to update my SDK 2.3 to the latest revision of 2.3. I don't want to update to 3.0 preview and lose the GPS emulation and have a slow emulator. 2.3 is just fine for me. I've updated the ADT plugin to 9.0.0 by the Eclipse 'check for updates'.

If I run the AVD manager from Eclipse and look at my installed packages, I have installed :

and the available packages with the ones that I think I want checked are:

My question is: what do I get with the platform tools? Is it just what goes in the platform-tools folder (i.e. the aapt.exe, adb.exe etc)? I don't want to overwrite the tools folder and en开发者_如何学JAVAd up with the slow emulator.

Yes, platform-tools are adb.exe and friends. You will also want Android SDK Tools, revision 9 as well, and don't worry about Honeycomb stuff - even if you do install them, they won't interfere with you (for example you can filter on platform version within the developer docs).