It seems your in some weird mode because the tools are always there for me in the piano view of a midi track.. I must admit I've never opened a blank midi track, I always record something there first. Or I've imported the tracks.
He's what I do maybe it will help.
Insert Soft synth-Session drummer-open the GUI and select a kit. test kit with GUI and mouse.
Insert a MIDI track and set output to Session drummer.
Record the drum part with a controller.
Edit drum part in piano view.
During editing I will use the select pointer to move notes
The erase tool to delete
The draw tool to change values or add new notes.