Lawyers know how to read tracked changes, so the agent's work arrives in that form. For contract review, the agent produces a Word file with proposed edits and a comment explaining each one. For research and drafting, it can supply a memo in Word with its sources listed. Your lawyer opens it, accepts or rejects each change and carries on in the tool they already use.
Because lawyers already trust the format, adoption is easy. Nobody needs a new interface or a login to read the agent's work. Your team opens a document, sees the changes and reads the reasons. That is a good test of whether the output is useful, and it takes minutes to run on a sample.
Drafts should never be mistaken for final documents. We label agent output clearly, keep the original untouched and save the marked-up version alongside it. If you use a document management system, the drafts can be saved to the matter there.
Decide your house style first: fonts, numbering and comment tone. The agent can follow a template, but it cannot guess your preferences. Also decide who clears the tracked changes before a document leaves the firm. A short checklist for that step helps stop internal comments reaching a counterparty.