Identifying that something is outside the scope
Most added tasks arrive informally: a request to a cleaner during a shift, a note left on a bench, a mention in passing to a supervisor. The first step is simply recognising that the request is not in the agreement, which is only possible if the agreement is specific enough to check. A vague scope makes this impossible, which is one reason vagueness costs money over time rather than saving it.
The second step is to say so promptly and without treating it as a problem. A request for something outside the scope is a normal event, not a complaint, and the useful response is a description of what the task would involve. Often the client's actual need turns out to be simpler or different from the request, and that conversation happens best before anything is priced. Handling it that way also keeps the relationship straightforward, because the client hears a description rather than a refusal and can decide with the facts in front of them.
