diff --git a/hdk/common/representation/intermediate.py b/hdk/common/representation/intermediate.py
index 0c98d8eb6..e257556d5 100644
--- a/hdk/common/representation/intermediate.py
+++ b/hdk/common/representation/intermediate.py
@@ -200,8 +200,8 @@ class ArbitraryFunction(IntermediateNode):
         super().__init__([input_base_value])
         assert len(self.inputs) == 1
         self.arbitrary_func = arbitrary_func
-        self.op_args = deepcopy(op_args) if op_args is not None else ()
-        self.op_kwargs = deepcopy(op_kwargs) if op_kwargs is not None else {}
+        self.op_args = op_args if op_args is not None else ()
+        self.op_kwargs = op_kwargs if op_kwargs is not None else {}
         # TLU/PBS has an encrypted output
         self.outputs = [EncryptedValue(output_dtype)]
         self.op_name = op_name if op_name is not None else self.__class__.__name__
diff --git a/hdk/hnumpy/tracing.py b/hdk/hnumpy/tracing.py
index a06125399..1a4996061 100644
--- a/hdk/hnumpy/tracing.py
+++ b/hdk/hnumpy/tracing.py
@@ -1,4 +1,5 @@
 """hnumpy tracing utilities."""
+from copy import deepcopy
 from typing import Callable, Dict, Mapping
 
 import numpy
@@ -53,6 +54,7 @@ class NPTracer(BaseTracer):
             input_base_value=self.output,
             arbitrary_func=normalized_numpy_dtype.type,
             output_dtype=output_dtype,
+            op_name=f"astype({normalized_numpy_dtype})",
         )
         output_tracer = self.__class__(
             [self], traced_computation=traced_computation, output_index=0
@@ -103,7 +105,8 @@ class NPTracer(BaseTracer):
             input_base_value=input_tracers[0].output,
             arbitrary_func=numpy.rint,
             output_dtype=common_output_dtypes[0],
-            op_kwargs=kwargs,
+            op_kwargs=deepcopy(kwargs),
+            op_name="numpy.rint",
         )
         output_tracer = self.__class__(
             input_tracers, traced_computation=traced_computation, output_index=0