Toilet leaking, possibly related to loose screws?
Verify that the condensation is or isn't the cause of the water pooling at the toilet base, first. Placing a paper sheet under the tank will show if the water is dripping.
Also check that the supply hose at both ends are not leaking. Make sure the vale is seat tightly by tightening the nut at the bottom (outside) of the tank.
Also check that the tank is secure to the bowl. Tighten the (2) nuts on the underside of the tank.
I found using a flashlight helps locate any leaks around the bowl and tank. If none are found chances are the leak is due to the wax ring not sealing and you'll need to pull the toilet and install a new ring.
You may want to remove the toilet anyway to re-attach the brass bolt that has come loose. The toilet flange may have broken where the bolt is placed.