It is possible to have 3rd party tools contribute text to the changelog?

I'm thinking of tools like NArrange (which can totally re-arrange files) or FxCop that is usually a sign that warnings get fixed in bulk.

It would be nice if these could could already prepare some of the changelog for a next check-in (I'm thinking of a simple message like 'tool x has run at timestamp y').

It would be 'easy' to implement if the changlog textbox would pickup a predefined textfile when showing the checkin dialog to the user (and delete it after a checkin).