You can use a workflow as the input for another workflow, read as a CSV file. Filter the output to rows containing "Node ToolID", which should give you one row per tool.
You'll probably need to tweak the input to get it working correctly, e.g. increase field length, set delimiter to \0, no field names.
Hi @Nico67543 ,
@Christina_H suggestion is a nice approach and allows you to retrieve more information about each node if needed.
If you only need to count the number of tools and nothing else, you can use this sample macro here.
Best,
Fernando Vizcaino