Consider this hypothetical request:
Do not send the proposal yet. We have not worked out the price.
An AI makes it more professional:
The pricing section has room for improvement and would benefit from further refinement.
The second sentence sounds better. Should the colleague send the proposal?
The price survived. The instruction to stop did not. A red light became a helpful suggestion.
A sentence also does something
When checking an AI rewrite, we often inspect names, numbers, tone, and whether it sounds like us. But “do not send” is also an action: it pauses a decision.
“I am not attending” and “this may be difficult for me” can cause different responses. One closes an arrangement; the other invites negotiation. “I have not decided” and “I am excited about this” can also produce different assumptions.
Sometimes that change is exactly what the person wants. They may want a firm refusal to leave room for further discussion. But it should be a visible choice, not a quiet consequence of “make this more polished.”
A sentence's elegance is a property of its wording. Its fidelity also depends on what the recipient will do next.
A red light can be polite
“We still need to check the price, so please hold this version until we confirm” is gentler than the original instruction without reversing it.
A useful comparison is to imagine giving the original and revised versions to two equally informed colleagues. Would they take the same next action?
This catches changes ordinary proofreading can miss: a condition vanishes, uncertainty becomes agreement, or a refusal becomes negotiable.
If the original is genuinely ambiguous, the assistant can identify the ambiguity. It does not need to silently choose the most socially convenient interpretation.
A person's voice is more than their favorite phrases
It is easy to describe voice through sentence length, vocabulary, or emoji. Those details matter. They are not enough for an assistant to speak on someone's behalf.
An AI can agree to something I refused, using exactly my usual phrasing. That is faithful imitation and unfaithful representation at the same time.
There are smaller losses too. Imagine a mother mentioning the cold and then reminding her child to wear another layer. An editor may find the repetition unnecessary. Removing it preserves the weather information while erasing something familiar about the person speaking.
That does not mean every repetition must remain. If she wants a shorter message, help her shorten it. But editing conventions should not automatically flatten the way a family talks to itself.
A technically elegant letter can sound as though it came from a relative nobody recognizes.
Keep the choice visible
I prefer an editor that keeps the original near the proposed revision and explains consequential changes.
“This sentence may sound angry” is an editorial observation. “I am not angry” is a statement about the sender's internal state. The first can be offered; the second needs their endorsement.
Likewise, suggesting a smoother phrase is assistance. Assuming that the user should always be smoother is a choice about how they ought to behave.
The standard I want is straightforward: help the recipient hear what I mean more clearly. That includes the conditions, uncertainty, and decisions that made the original less comfortable to read.
It includes the word “no.”