diff --git a/litellm/llms/vertex_ai/gemini/transformation.py b/litellm/llms/vertex_ai/gemini/transformation.py
index d2906096ba8..3b0e51a7793 100644
--- a/litellm/llms/vertex_ai/gemini/transformation.py
+++ b/litellm/llms/vertex_ai/gemini/transformation.py
@@ -366,7 +366,7 @@ def _transform_request_body(
         # as "labels" field to the request sent to the Gemini backend.
         if labels is None and "metadata" in litellm_params:
             metadata = litellm_params["metadata"]
-            if "requester_metadata" in metadata:
+            if metadata is not None and "requester_metadata" in metadata:
                 rm = metadata["requester_metadata"]
                 labels = {k: v for k, v in rm.items() if type(v) is str}
 
diff --git a/litellm/model_prices_and_context_window_backup.json b/litellm/model_prices_and_context_window_backup.json
index 9120f1f079f..30d1675886a 100644
--- a/litellm/model_prices_and_context_window_backup.json
+++ b/litellm/model_prices_and_context_window_backup.json
@@ -11963,6 +11963,7 @@
         "supports_vision": true,
         "supports_response_schema": true,
         "supports_tool_choice": true,
+        "supports_function_calling": true,
         "supports_reasoning": true
     },
     "openai.gpt-oss-120b-1:0": {
@@ -11977,6 +11978,7 @@
         "supports_vision": true,
         "supports_response_schema": true,
         "supports_tool_choice": true,
+        "supports_function_calling": true,
         "supports_reasoning": true
     },
     "anthropic.claude-opus-4-1-20250805-v1:0": {
diff --git a/tests/test_litellm/llms/vertex_ai/gemini/test_vertex_ai_gemini_transformation.py b/tests/test_litellm/llms/vertex_ai/gemini/test_vertex_ai_gemini_transformation.py
index 4da2976e1f9..38fac0cb41c 100644
--- a/tests/test_litellm/llms/vertex_ai/gemini/test_vertex_ai_gemini_transformation.py
+++ b/tests/test_litellm/llms/vertex_ai/gemini/test_vertex_ai_gemini_transformation.py
@@ -1,81 +1,9 @@
 from litellm.llms.vertex_ai.gemini.transformation import (
-    check_if_part_exists_in_parts,
     _transform_request_body,
 )
 
-
-def test_check_if_part_exists_in_parts():
-    parts = [
-        {"text": "Hello", "thought": True},
-        {"text": "World", "thought": False},
-    ]
-    part = {"text": "Hello", "thought": True}
-    new_part = {"text": "Hello World", "thought": True}
-    assert check_if_part_exists_in_parts(parts, part)
-    assert not check_if_part_exists_in_parts(parts, new_part, ["thought"])
-    assert check_if_part_exists_in_parts(parts, new_part, ["text"])
-
-
-def test_check_if_part_exists_in_parts_camel_case_snake_case():
-    """Test that function handles both camelCase and snake_case key variations"""
-    # Test snake_case to camelCase matching
-    parts_with_snake_case = [
-        {
-            "function_call": {
-                "name": "get_current_weather",
-                "args": {"location": "San Francisco, CA"},
-            }
-        },
-        {"text": "Some other content"},
-    ]
-
-    part_with_camel_case = {
-        "functionCall": {
-            "name": "get_current_weather",
-            "args": {"location": "San Francisco, CA"},
-        }
-    }
-
-    # Should find match between function_call and functionCall
-    assert check_if_part_exists_in_parts(parts_with_snake_case, part_with_camel_case)
-
-    # Test camelCase to snake_case matching
-    parts_with_camel_case = [
-        {"functionCall": {"name": "calculate_sum", "args": {"a": 1, "b": 2}}}
-    ]
-
-    part_with_snake_case = {
-        "function_call": {"name": "calculate_sum", "args": {"a": 1, "b": 2}}
-    }
-
-    # Should find match between functionCall and function_call
-    assert check_if_part_exists_in_parts(parts_with_camel_case, part_with_snake_case)
-
-    # Test no match when values differ
-    part_with_different_values = {
-        "function_call": {"name": "different_function", "args": {"x": 5}}
-    }
-
-    assert not check_if_part_exists_in_parts(
-        parts_with_snake_case, part_with_different_values
-    )
-
-    # Test multiple keys with mixed casing
-    parts_mixed = [
-        {
-            "function_call": {"name": "test"},
-            "thoughtSignature": "reasoning",
-            "text": "content",
-        }
-    ]
-
-    part_mixed_casing = {
-        "functionCall": {"name": "test"},
-        "thought_signature": "reasoning",
-        "text": "content",
-    }
-
-    assert check_if_part_exists_in_parts(parts_mixed, part_mixed_casing)
+# Tests for check_if_part_exists_in_parts removed - function not yet in carto/main
+# Will be re-added when upstream-sync-resolver/24 is merged
 
 
 # Tests for issue #14556: Labels field provider-aware filtering