Tool interface device, plug-in tool having tool interface device, and machine tool system having plug-in tool and machine tool

The invention relates to a tool interface device (10a; 10b, 10b; 10c), in particular for a plug-in tool (12a; 12b; 12b; 12c) for inserting the insertion tool (12a; 12b; 12b; 12c) and the machine tool (16a; 16b, 16b; 14c) of the tool holder (16a; 14b; 14b; 14c), which tool interface device has at least one connection interface (18a; 18b, 18b; 18c) for engaging with the tool receptacle (14a; 14b; 14b; 20c) of the clamping device (14a; 20a '; 20b; 20b; 20c) is connected in a force-fitting and/or form-fitting manner, said connection interface (18a; 18b, 18b; 18c) has at least one connection element (18a; 18b) at least partially via the connection interface (18a; 18b, 18b; 24c) of the limiting element (18a; 24b, 24b; 22a, 22b) delimited by the recess (24c; 22b; 22c), and wherein the connection interface (18a; 18b, 18b; 18c) has at least one securing element (26a; 26b; 26b; 26c), which at least partially forms a limiting edge (24a; 24b, 24b; 24c). According to the invention, the connection interface (18a; 18b, 18b;