All tools will be provided but having an extra set can be helpful.
As an FTAA you will be helping teams to connect to the field and diagnose issues. I would suggest you become familiar with the field monitor. Ask your FTA about getting the field monitor on your phone or tablet, be sure you have a device with a good battery. I don't know if it has been posted yet but FIRST usually gives their volunteers a quick guide to connectivity. Basically if a team DS is not connected yet, check that. Common fixes are checking the ethernet cable is plugged in and the one for the correct station, restarting the DS software, making sure firewall/windows defender/mcafee are shut down and confirming the wifi on the computer is disabled. The DS has to connect to FMS before the robot can. If a robot is not connecting check if the roboRIO and radio have power, check if they have an ethernet connection. Familiarize yourself with the
light codes. If something needs to be changed on the robot (including powering it on), have a member of the team come out and do it.
Remember your job is at the field, don't leave the field unless the FTA knows you are doing so.
You will also be looked to as one of the more knowledgeable and experienced volunteers. It is amazing how people's opinion change when they see a volunteer with a radio. If you do not know the answer to a question, find a person that does. No answer is better than a wrong one.
When you first get to the competition (maybe after field set-up) be sure to introduce yourself to the FTA, Field Supervisor, Scorekeepr, VC, LRI, Pit Admin and CSA. These are the people you will need to interact with most. Try to remember their names and also thank them for their help.
Keep in mind that FIRST's customers are the teams. Be gracious and professional whenever you are working with them or when someone from a team might be around. You will probably get stressed at some point, take a deep breath, don't get mad, don't curse, handle the situation with respect. You can tell people that you need to handle certain problems in order of importance. This is also when you can direct robot problems to the CSA or LRI.
Finally, have fun. I enjoy being a FTAA, you get to see a lot of action and interact with the teams. Remember to celebrate a high score (but don't show favorites) and keep the environment light and fun. Nothing will kill a mode as quickly as seeing a volunteer that doesn't want to be there.