One possibility is that we could add the Database, Table, or Column comment onto the status line below the Data Source Explorer. Currently when you select a database, table, or column in the DSE, the name is displayed in the status line. We could append the comment in parenthesis to this display.
That might work, but it would make finding something in a comment cumbersome. I was expecting something more along the lines of the label decorations or hovering for the comment like SQL Assistant behaves.
Thank you for the feedback. I have opened a JIRA improvement for your request to display the database object comment when hovering over the object in the Data Source Explorer.