Your note says “I will investigate.” The rewritten email says “We will resolve this by Friday.” It sounds helpful, but the assistant has added both a result and a deadline. A better tone is useful only if the message still says what you mean.
NIST describes a general risk of generative AI: confident output can be false or diverge from the supplied information. The email example here is an illustration, not a reported product test. The checks below are a practical editing routine, not a guarantee that a particular model will follow instructions.
Give the rewrite a factual boundary
Write down the agreed action, who will do it, any confirmed date and anything still uncertain. Ask for clearer wording without new facts or commitments. If a detail is missing, ask the assistant to flag it outside the draft rather than invent it.
For example, “We are checking availability” must not become “Your booking is confirmed.” Likewise, a plan to send an update is different from a promise to finish the work. Keep those distinctions when accepting suggestions.
Read the promises separately from the prose
Compare dates, amounts and phrases such as “we will”, “confirmed” and “guaranteed” with the original note. Check the recipient, the person assigned an action and any mention of an attachment. If the email says a file is attached, open the actual attachment and check that it is the right version.
Finally, ask what the recipient might do because of this email. If they could make plans around an unsupported promise, revise it. Use a next step you can actually commit to, then approve the final wording yourself before sending.