Exact language prevents arguments about what vague language supposedly meant.

Loose wording feels efficient in the moment because everyone nods. The disagreement is still there, just postponed, and it resurfaces later as a fight about what was actually agreed, with each side sincerely remembering the version that suited them. The vague sentence did not prevent the conflict, it only delayed it and made it harder to resolve.

Before closing out an agreement, state the specific version out loud, who does what, by when, and what done looks like. If that feels uncomfortable, that discomfort is the disagreement you were about to defer. Better to have the small friction now than the larger one later.