It would be nice to have a tool that could step through the code and insert blocks of comments for each function.

Including putting in the parameters and return values.
Of course it will not be able to write a description of the function, but I find it hard to remember the syntax of the comments, so any automatic help would be very nice for a future PHPEd.

I second this.
At this time, I create an autocorrection for this.

When I type sp_fc, it autoreplaces it with a comment block, but something more automated would definitely be a great addition!

I'm bit lazy to code it but generally you can do it by writing a simple php code to search for functions and add the comment tags before it, there are already tutorials for it on this forum (shell php5)