Comments seem to be posted one after another in a linear fashion regardless if it is private or public. It might be nice to have agents be able to comment on private comments from other agents. This could create a collapsable thread between agents. It might help keep track of their conversation with each other, especially if there are multiple comments between agent and requester that fills up the comment section. Also, it could be nice to add a reaction to an agents comment like check mark or X to showcase that their request was completed.
e.g. An agent @';d me in a private comment on an incident to complete something for them, then proceeded with several comments to the requester. It would be nice to have a 'reply to comment' option to that agents comment to confirm that I completed what was requested rather than mixing my comment into the agent and requesters comments.