diff --git a/pr_agent/servers/github_action_runner.py b/pr_agent/servers/github_action_runner.py
index 417e8154..bdd4f5cf 100644
--- a/pr_agent/servers/github_action_runner.py
+++ b/pr_agent/servers/github_action_runner.py
@@ -54,6 +54,7 @@ async def run_action():
     if OPENAI_KEY:
         get_settings().set("OPENAI.KEY", OPENAI_KEY)
     else:
+        # Might not be set if the user is using models not from OpenAI
         print("OPENAI_KEY not set")
     if OPENAI_ORG:
         get_settings().set("OPENAI.ORG", OPENAI_ORG)
@@ -89,6 +90,7 @@ async def run_action():
         if action in pr_actions:
             pr_url = event_payload.get("pull_request", {}).get("url")
             if pr_url:
+                # legacy - supporting both GITHUB_ACTION and GITHUB_ACTION_CONFIG
                 auto_review = get_setting_or_env("GITHUB_ACTION.AUTO_REVIEW", None)
                 if auto_review is None:
                     auto_review = get_setting_or_env("GITHUB_ACTION_CONFIG.AUTO_REVIEW", None)
@@ -99,6 +101,7 @@ async def run_action():
                 if auto_improve is None:
                     auto_improve = get_setting_or_env("GITHUB_ACTION_CONFIG.AUTO_IMPROVE", None)
 
+                # invoke by default all three tools
                 if auto_describe is None or is_true(auto_describe):
                     get_settings().pr_description.final_update_message = False  # No final update message when auto_describe is enabled
                     await PRDescription(pr_url).run()
@@ -128,7 +131,7 @@ async def run_action():
                 if event_payload.get("issue", {}).get("pull_request"):
                     url = event_payload.get("issue", {}).get("pull_request", {}).get("url")
                     is_pr = True
-                elif event_payload.get("comment", {}).get("pull_request_url"):
+                elif event_payload.get("comment", {}).get("pull_request_url"):  # for 'pull_request_review_comment
                     url = event_payload.get("comment", {}).get("pull_request_url")
                     is_pr = True
                     disable_eyes = True