main: further document get_rules

capa/main.py

@@ -613,6 +613,9 @@ def get_rules(
     """
     args:
       rule_paths: list of paths to rules files or directories containing rules files
+      disable_progress: disable progress bar
+      cache_dir: directory to use for caching rules, or will use the default detected cache directory if None
+      on_load_rule: callback to invoke before a rule is loaded, use for progress or cancellation
     """
     if cache_dir is None:
         cache_dir = capa.rules.cache.get_default_cache_directory()