About :
Don't touch my items.
I just plain don't trust that my friends won't touch my items.
There is also an option to make chests view only, this will allow anyone to see but not touch items in your chests.
Another option is select access, basically selecting someone who can access your chests anyway.
The mod will alert the server if someone logs on without the mod installed.
How to install :
1. Install Smapi
2. Unzip the file and place it in the mod folder
Config Options :
OpenButton : The button(s) on which the lock menu should open (for a list of available options, go to [Stardew Wiki])
LockOnTransfer : Whether or not the chests should be locked after you transfer it, otherwise it will be view only
Default :
OpenButton : "F1,LeftStick"
LockOnTransfer : false
[Source Code]