We seem to have a bug from very early on that never surfaced:

Obviously, nowhere in the CLI params there is a setting for the ocrd_tool.

However, our Processor decorator ocrd_cli_wrap_processor does take such a kwarg:

It does nothing but pass it on to run_processor:

In that context, ocrd_tool could be meaningful (e.g. when running a processor from API):

So it gets passed onto the processor constructor:

Still, this is not usually a problem, because all of our Processor subclasses simply override that kwarg.

But what if they just default to their own value?

IMO the top-level ocrd_tool param is wrong must be removed.