diff --git a/src/labthings/default_views/actions.py b/src/labthings/default_views/actions.py
index 951fa05..aa09fc5 100644
--- a/src/labthings/default_views/actions.py
+++ b/src/labthings/default_views/actions.py
@@ -28,6 +28,16 @@ def get(self):
     }
 
 
+TASK_ID_PARAMETER = {
+    "name": "task_id",
+    "in": "path",
+    "description": "The unique ID of the action",
+    "required": True,
+    "schema": {"type": "string"},
+    "example": "eeae7ae9-0c0d-45a4-9ef2-7b84bb67a1d1",
+}
+
+
 class ActionObjectView(View):
     """Manage a particular action.
 
@@ -37,6 +47,8 @@ class ActionObjectView(View):
 
     """
 
+    parameters = [TASK_ID_PARAMETER]
+
     def get(self, task_id):
         """Show the status of an Action
 
diff --git a/src/labthings/views/builder.py b/src/labthings/views/builder.py
index 7403f88..d05b6fa 100644
--- a/src/labthings/views/builder.py
+++ b/src/labthings/views/builder.py
@@ -50,6 +50,22 @@ def _get(_, path=""):
     }
 
     # Generate a basic property class
-    generated_class = type(name, (View, object), {"get": _get})
+    generated_class = type(
+        name,
+        (View, object),
+        {
+            "get": _get,
+            "parameters": [
+                {
+                    "name": "path",
+                    "in": "path",
+                    "description": "Path to the static file",
+                    "required": True,
+                    "schema": {"type": "string"},
+                    "example": "style.css",
+                }
+            ],
+        },
+    )
 
     return generated_class