How do i give the player an item when they say something?

Well first thing, I see you're using LocalPlayer, there is 2 problems with this:

1. If you give the tool using a LocalScript, it will not be replicated in the server
2. You're using ServerStorage, LocalScripts cannot access ServerStorage

Plus, it isn't necessary, as we already have the player variable

So instead, put your code in a normal script, here's a version that should work:

local CallMsg = "sword"

local item = game.ServerStorage.R6Sword

game.Players.PlayerAdded:Connect(function(player) 
    player.Chatted:Connect(function(msg) 
        if msg == CallMsg then 

            local original = item
            local copy = original:Clone()
            copy.Parent = player.Backpack

        end
    end)
end)

You can place this script in ServerScriptService if you'd like

Oh and btw, I recommend using ReplicatedStorage to store tools.