Central bank communications frequently contain information about financial-market backstops that affect monetary policy transmission. We identify these transmission protection surprises in the euro area, alongside policy stance and central bank information surprises, by exploiting heteroskedasticity in minute-by-minute asset price movements. Unlike standard factor models, our approach allows active policy dimensions and their impacts to vary across events. Event-specific decompositions quantify the narrative record and reveal substantial heterogeneity of effects across announcements. We show that transmission protection is a distinct dimension of central bank announcements, with financial-market effects separate from both policy stance and information shocks.