diff --git a/rest/db-need-get.rst b/rest/db-need-get.rst
index d6e49e2eb..a68c29d63 100644
--- a/rest/db-need-get.rst
+++ b/rest/db-need-get.rst
@@ -30,3 +30,6 @@ needed by this device in order for it to become in sync.
           ...
       ]
     }
+
+.. note::
+  This is an expensive call, increasing CPU and RAM usage on the device. Use sparingly.