Risk to the writer: Low
A reasonable clause and the easiest to live with, if you keep a record of what you used. The risk is that disclosure obligations accumulate without anyone recording what was disclosed.
Keep a per-project note of tools used and what they were used for. It takes a minute and turns an awkward question into a one-line answer.
General information, not legal advice. Have a solicitor or attorney review anything you intend to sign.