diff --git a/server/entertainment_decider/common/_itertools.py b/server/entertainment_decider/common/_itertools.py
index c15b82c..edd2239 100644
--- a/server/entertainment_decider/common/_itertools.py
+++ b/server/entertainment_decider/common/_itertools.py
@@ -17,6 +17,9 @@ T = TypeVar("T")
 
 
 def all_same(iterable: Iterable) -> bool:
+    """
+    Returns True if all items of Iterable are equal, False otherwise.
+    """
     it = iter(iterable)
     first = next(it)
     return all(first == elem for elem in it)