diff --git a/litellm/litellm_core_utils/llm_cost_calc/tool_call_cost_tracking.py b/litellm/litellm_core_utils/llm_cost_calc/tool_call_cost_tracking.py
index e7fa3454411..c5bfcaba0d5 100644
--- a/litellm/litellm_core_utils/llm_cost_calc/tool_call_cost_tracking.py
+++ b/litellm/litellm_core_utils/llm_cost_calc/tool_call_cost_tracking.py
@@ -3,7 +3,11 @@ Helper utilities for tracking the cost of built-in tools.
 """
 
 from collections.abc import Mapping
-from typing import Final, Literal, cast
+from typing import (
+    Final,
+    Literal,
+    cast,  # noqa: TID251  # narrows SDK-union output items and dict fallbacks into typed views
+)
 
 from pydantic import ValidationError