Mine eat figs and sometimes get leaves in the process (they are plucking them right off the tree) and we have had no issues arise. Fig leaves have a milky sap in them and taste terrible; I do not think your tortoise will enjoy them. I don't find them to be harmful, but not a favorite food here by any means!
waiting for some fruit to drop
this one dug a burrow right under the fig tree and noms all the leaves that fall into her 'lair'