The 34-year-old retired from international rugby in April when he signed a new deal with the wealthy French club, but he has done a U-turn to turn out for Samoa in the historic test against the All Blacks in Apia.
Toulouse bosses Fabien Pelous and Ugo Mola are concerned the experienced front-rower may now be tempted to push on and play at this year's Rugby World Cup.
"We thought that Census had retired from international rugby. The fact that he is playing against the All Blacks is a bit of a surprise and unsettling," Pelous told specialist French website Rugbyrama.
