I need to show the description of column as a tooltip when a user hover a mouse on a column, I am doing this based on Adding custom hover text using json to a SharePoint list column
But I need to enter the description manually rather than reading the description of the column that I put earlier for that column in the Description textbox.
see below:
If I change "txtContent": "[$Description]", to "txtContent": "This is the desciption", it works fine, is there any way to fix the previous issue and get the description rather than entering a new description here as txt