diff --git a/litellm/llms/vertex_ai/gemini/vertex_and_google_ai_studio_gemini.py b/litellm/llms/vertex_ai/gemini/vertex_and_google_ai_studio_gemini.py
index 8949ac7f9c5..f8715b510a6 100644
--- a/litellm/llms/vertex_ai/gemini/vertex_and_google_ai_studio_gemini.py
+++ b/litellm/llms/vertex_ai/gemini/vertex_and_google_ai_studio_gemini.py
@@ -411,7 +411,7 @@ class VertexGeminiConfig(VertexAIBaseConfig, BaseConfig):
         if not isinstance(tools, list):
             return
 
-        deduplicated: Final[list] = []
+        deduplicated: Final[list] = []  # mutable-ok: request payload requires an ordered list
         for tool in tools:
             if tool not in deduplicated:
                 deduplicated.append(tool)