He won four All-Ireland Senior Football medals with Dublin. He won his first title in 1974 against Galway in a final that finished on a scoreline of 0-14 to 1-6. His second title was won in 1976 when Dublin beat rivals Kerry by seven points in a game that finished on a scoreline of 3-8 to 0-10. Anton's third title was achieved the following year when Dublin trounced Armagh in a game that finished on a scoreline of 5-12 to 3-6. After six years he finally lifted won his fourth all-Ireland medal against Galway in a repeat of his first title in 1974. Dublin defeated Galway by a scoreline of 1-10 to 1-8. During the period in which O'Toole played for Dublin, he won eight Leinster Senior Football Championship medals.
He is now manager of the Templeogue-Synge Street Senior football team which includes Denis Bastick and Eoghan O'Gara. In 2008, he guided 'Synger' to the Intermediate Football Championship with a historic victory over Kilmacud Crokes in the final in Parnell Park.