Drawing Template/Rev Block Question

do you want a script for this? and how/where you want to retrieve the description from?

You can map the transition comment to a field on the title block.

You need to define where the Rev Description is stored so we can answer you better. Is it a static hard coded value or dynamically entered by the user approving?

You can create a text file for it to read from.

But, the description of changes would vary between drawings. How would it know?

I use my own revision table, you can very easily add Custom Properties and have them populate to the sheet.  Do you use Custom Property Tab Builder??

Do you need sample files/templates??