That is the foundation on which the Governing Council renders account of past policy. The Council makes its decisions jointly. The responsibility for price stability is shared by all members. So far, the Council has never voted over its interest rate policy, which points to a high level of consensus.
But this emphatically does not mean that everyone has always agreed on everything, which in itself is a good thing. Consensus only implies that all members of the Council have been able eventually to go along with every interest rate decision. Has consensus slowed down monetary policy decision-making? No, it has not.