Only what the agreed scope needs, at the right permission level. Burly Wolf asks for manager or delegated access, not your passwords.
Everything is agreed in writing before work starts: what is included, what is excluded and the price. Out-of-scope work is quoted separately before it begins.
One clear point of accountability. The direction, priorities and communication stay with Burly Wolf, and specialists are brought in where the work needs them.
Because the real problem may sit somewhere else. Burly Wolf finds where customers or money are being lost first, then fixes the part that matters.
The work is tested before it is treated as complete, and judged against customers, revenue and wasted spend, not activity.