I recently went to the receive tab of my Electrum wallet and generated a new address to receive some Bitcoin. I accidentally left the description field blank before clicking the New Address button and would like to add a description after the fact for future reference.

What I noticed:
1. I noticed in the History tab I can edit the description of any transaction listed here. I was able to update the description on this tab.
2. I noticed in the Receive tab there is still no description for this transaction and the UI does not allow you to edit the description after it was already generated.

My questions:
1. I found that a way to add the description is to open the wallet's .json file and fine the Message: "" field and add the description I wanted. I am assuming this json file is what Electrum uses to load values in the UI and as long as I don't go around changing things like the structure or fields I don't know about then I should be fine. Is there anything wrong with me doing this?

2. Does the description field have anything to do with what is actually transmitted to the network or just for local reference within the Electrum app?