diff --git a/homeassistant/components/shopping_list/common.py b/homeassistant/components/shopping_list/common.py
index 4305ba84bded..cdd7faf42383 100644
--- a/homeassistant/components/shopping_list/common.py
+++ b/homeassistant/components/shopping_list/common.py
@@ -98,7 +98,7 @@ class ShoppingData:
     async def async_complete(
         self, name: str, context: Context | None = None
     ) -> list[dict[str, JsonValueType]]:
-        """Mark all shopping list items with the given name as complete."""
+        """Mark all incomplete shopping list items with the given name as complete."""
         complete_items = [
             item for item in self.items if item["name"] == name and not item["complete"]
         ]
diff --git a/homeassistant/components/shopping_list/strings.json b/homeassistant/components/shopping_list/strings.json
index 06ffc307b1a7..6c4fe93234fe 100644
--- a/homeassistant/components/shopping_list/strings.json
+++ b/homeassistant/components/shopping_list/strings.json
@@ -37,7 +37,7 @@
       "name": "Complete all shopping list items"
     },
     "complete_item": {
-      "description": "Marks the first item with matching name as completed in the shopping list.",
+      "description": "Marks all items with matching name as completed in the shopping list. Skips items that are already complete.",
       "fields": {
         "name": {
           "description": "The name of the item to mark as completed (without removing).",