The only action that execute requests is executeRequestJson (executeRequestJsonText use it as well).

I added this in the action:

var customRequestAction = Server.getCustomProperty(restHost, "customRequestAction");

if (customRequestAction != null) {

  eval('var objectsProperties = System.getModule("' + customRequestAction.module.name + '").' + customRequestAction.name + "(restHost, method, url, params, content, contentType);");

  return objectsProperties;

}

Which gets the custom property value and execute the action.

With duplicating executeRequestjson (and removing thee lines to avoid infinite loop), adding a throw "stop" at the start I cannot run a single query on the host including the ones during Create a type workflow.

Please double check that the action is not executed adding a throw and double check if you have the lines I pasted in your executeRequestJson