Exactly which URL did you use for Tools 3.1.m3? I installed using the link from the "Development Updates", sans BIRT, and that worked just fine.
Exactly what missing dependencies were mentioned?
The missing update sites required to install the maven or birt integration are listed here:
Add the following URLs into Eclipse the same way you added the JBoss Tools update site URL, and make sure the checkbox for 'Contact all update sites' is checked.
If these sites are already in your list, make sure they're enabled:
Help > Install... > Available software sites > scroll, find, click Enable > OK.
Thanks for the quick responses. I have downloaded the last Galileo version (SR1) today, and JBossTools worked at first time! Seems there were some dependencies which were added to this SR