In the section on thieves tools XGE states: "Investigation and Perception. You gain additional insight when looking for traps, because you have learned a variety of common signs that betray their presence."
What does "additional insight" mean? Is this advantage? Is it a proficiency bonus?
If it is a proficiency bonus does this stack if you already have proficiency in investigation or perception? How about if you have expertise in any of these? Conceivably this could be proficiency times 4 if you have expertise both in the skill and in thieves tools
What does "additional insight" mean? Is this advantage? Is it a proficiency bonus?
If it is a proficiency bonus does this stack if you already have proficiency in investigation or perception? How about if you have expertise in any of these? Conceivably this could be proficiency times 4 if you have expertise both in the skill and in thieves tools