One way would be to ask for an update before we make a decision. By making an explicit statement that a decision will be taken in the future you're making it clear that this wasn't the decision.

Another would be to be explicit about asking for them to conduct an experiment or test, as those would unambiguously not be intended to be a final solution.

But you might then well find that the request to carry out an experiment to do X will sound equally nebulous. But at least it's clear you're not being told it's a decision to do X.