Add note about deprecated methods to docstrings

src/qcodes/instrument/instrument_base.py

@@ -674,7 +674,14 @@ def _is_abstract(self) -> bool:
         category=QCoDeSDeprecationWarning,
     )
     def __getitem__(self, key: str) -> Callable[..., Any] | Parameter:
-        """Delegate instrument['name'] to parameter or function 'name'."""
+        """
+        Delegate instrument['name'] to parameter or function 'name'.
+
+        Note:
+            This is deprecated. Use attributes directly or if dynamic attribute required look up via
+            .parameters or .functions dictionaries
+
+        """
         try:
             return self.parameters[key]
         except KeyError:
@@ -692,6 +699,10 @@ def set(self, param_name: str, value: Any) -> None:
             param_name: The name of a parameter of this instrument.
             value: The new value to set.
 
+
+        Note:
+            This is deprecated. Call set directly on the parameter.
+
         """
         self.parameters[param_name].set(value)
 
@@ -709,6 +720,9 @@ def get(self, param_name: str) -> Any:
         Returns:
             The current value of the parameter.
 
+        Note:
+            This is deprecated. Call get directly on the parameter.
+
         """
         return self.parameters[param_name].get()
 
@@ -727,6 +741,9 @@ def call(self, func_name: str, *args: Any) -> Any:
         Returns:
             The return value of the function.
 
+        Note:
+            This is deprecated. Call the function directly.
+
         """
         return self.functions[func_name].call(*args)