Can I log the reason for a saved search in the search form?

Can I log the reason a saved search is created?  I'd also like to log the goal of the search and the expected life.  I imagine it would be like the description field in the custom item entry form.

Is there a description field I can turn on?  or,
Can I enable the user notes tab on a search form?  or,
Can I create a custom description field and add it to the advanced search form?

It would help me manage searches for other employees if I could leave a note reminding me of the reasons we created it the way we did.  It would also help me delete searches that are no longer needed.  I don't want to delete searches solely based on the last edited date (suggested in another thread). For one reason it could have a functioning email notification even though the search hasn't been edited in a long time.