Is it possible to check for values under scripts? In other words, script to script communication

Is it possible to have two local scripts, located within a player model, that are able to check for values between one another? For instance, a player has a "MainPlayer" localscript and a "Weapon" localscript. I want the Weapon localscript to check for a child under the "MainPlayer" localscript (not a function or anything, just a RemoteEvent that MainPlayer is the parent of), is this possible?

Here's my attempt at trying:

local MainPlayer = script.Parent.Parent.Parent:WaitForChild("MainPlayer") local Guarding = MainPlayer:WaitForChild("Guarding")

From a ServerScript within a LocalScript that is a child of a Tool, I'm trying to get this script to wait for a RemoteEvent named "Guarding" that is located under another LocalScript under the Player, which is the Parent of the tool.