diff --git a/api/utils.py b/api/utils.py
index e1256a4..2a1261e 100644
--- a/api/utils.py
+++ b/api/utils.py
@@ -9,13 +9,14 @@ from werkzeug.security import generate_password_hash
 
 
 def admin_required(user_id, message='Access denied.'):
+    "Check if common user try to make administrative action."
     user = db.session.get(User, user_id)
     if user is None or user.role != "Administrator":
         abort(403, message)
 
 
 def validate_access(owner_id, message='Access denied.'):
-    # Check if user try to access or edit resource that does not belong to them 
+    "Check if user try to access or edit resource that does not belong to them."
     logged_user_id = int(get_jwt_identity())
     logged_user_role = db.session.get(User, logged_user_id).role
     if logged_user_role != "Administrator" and logged_user_id != owner_id:
@@ -31,6 +32,7 @@ def get_user_or_404(user_id):
 
 
 def wait_for_db(max_retries):
+    "Try to connect with database <max_retries> times."
     for _ in range(max_retries):
         try:
             with db.engine.connect() as connection: