They seem to mean exactly what you quoted - a lower risk tolerance means they tolerate less risk, meaning they are more cautious. Doing an avoidance maneuver if

They seem to mean exactly what you quoted - a lower risk tolerance means they tolerate less risk, meaning they are more cautious. Doing an avoidance maneuver if the risk exceeds 1/100K instead of 1/10K is being more cautious because 1/100K is a lower threshold than 1/10K.