diff --git a/src/neptune/new/handler.py b/src/neptune/new/handler.py
index 85816f5cd..d32b79351 100644
--- a/src/neptune/new/handler.py
+++ b/src/neptune/new/handler.py
@@ -24,6 +24,7 @@
     Iterable,
     Iterator,
     List,
+    NewType,
     Optional,
     Union,
 )
@@ -69,6 +70,8 @@
 if TYPE_CHECKING:
     from neptune.new.metadata_containers import MetadataContainer
 
+    NeptuneObject = NewType("NeptuneObject", MetadataContainer)
+
 
 def validate_path_not_protected(target_path: str, handler: "Handler"):
     path_protection_exception = handler._PROTECTED_PATHS.get(target_path)
@@ -94,7 +97,7 @@ class Handler:
         SYSTEM_STAGE_ATTRIBUTE_PATH: NeptuneCannotChangeStageManually,
     }
 
-    def __init__(self, container: "MetadataContainer", path: str):
+    def __init__(self, container: "NeptuneObject", path: str):
         super().__init__()
         self._container = container
         self._path = path
@@ -113,6 +116,24 @@ def __getitem__(self, path: str) -> "Handler":
     def __setitem__(self, key: str, value) -> None:
         self[key].assign(value)
 
+    def __getattr__(self, item: str):
+        run_level_methods = {"exists", "get_structure", "get_run_url", "print_structure", "stop", "sync", "wait"}
+
+        if item in run_level_methods:
+            raise AttributeError(
+                "You're invoking an object-level method on a handler for a namespace" "inside the object.",
+                f"""
+                                 For example: You're trying run[{self._path}].{item}()
+                                 but you probably want run.{item}().
+
+                                 To obtain the root object of the namespace handler, you can do:
+                                 root_run = run[{self._path}].get_root_object()
+                                 root_run.{item}()
+                                """,
+            )
+
+        return object.__getattribute__(self, item)
+
     def _get_attribute(self):
         """Returns Attribute defined in `self._path` or throws MissingFieldException"""
         attr = self._container.get_attribute(self._path)
@@ -125,6 +146,9 @@ def container(self) -> "MetadataContainer":
         """Returns the container that the attribute is attached to"""
         return self._container
 
+    def get_root_object(self) -> "NeptuneObject":
+        return self._container
+
     @check_protected_paths
     def assign(self, value, wait: bool = False) -> None:
         """Assigns the provided value to the field.
@@ -300,6 +324,7 @@ def log(
                 self._container.set_attribute(self._path, attr)
             attr.log(value, step=step, timestamp=timestamp, wait=wait, **kwargs)
 
+    @check_protected_paths
     def append(
         self,
         value: Union[dict, Any],
@@ -347,6 +372,7 @@ def append(
         value = ExtendUtils.validate_and_transform_to_extend_format(value)
         self.extend(value, step, timestamp, wait, **kwargs)
 
+    @check_protected_paths
     def extend(
         self,
         values: ExtendDictT,