update flag description
@@ -90,7 +90,9 @@ Outputs defined under target take precedence over this flag, see [defining outpu
#### watch-config
The `[--watch-config]` flag is used to enable automatic target loading from the configuration source at runtime.
-On each configuration change, gnmic reloads the list of targets, subscribes to new targets and/or deletes subscriptions to the deleted ones
+On each configuration change, gnmic reloads the list of targets, subscribes to new targets and/or deletes subscriptions to the deleted ones.
+
+Only addition and deletion of targets are currently supported, changes in an existing target config are not possible.
### Examples
#### 1. streaming, target-defined, 10s interval
