Within the commvault java gui, we are making heavily use of the 'tools', to execute commands on the clients.Do you know if it's also possible to execute those same tools on a client group?
A tool of type "executable" only runs on a given client. But you can create a workflow which takes a client group as input and executes that command in a loop for all the clients in that group. then you can create a new tool for a client group that runs this workflow. You can look at "demo - client group policy" on how to write such a workflow.