Fix gemini cli error (#14417)

* Fix gemini cli error

* Added better handling

---------

Co-authored-by: Ishaan Jaff <ishaanjaffer0324@gmail.com>

litellm/llms/gemini/count_tokens/handler.py

@@ -11,7 +11,39 @@ if TYPE_CHECKING:
 else:
     GenerateContentContentListUnionDict = Any
 
+
 class GoogleAIStudioTokenCounter:
+    def _clean_contents_for_gemini_api(self, contents: Any) -> Any:
+        """
+        Clean up contents to remove unsupported fields for the Gemini API.
+
+        The Google Gemini API doesn't recognize the 'id' field in function responses,
+        so we need to remove it to prevent 400 Bad Request errors.
+
+        Args:
+            contents: The contents to clean up
+
+        Returns:
+            Cleaned contents with unsupported fields removed
+        """
+        import copy
+
+        from google.genai.types import FunctionResponse
+
+        cleaned_contents = copy.deepcopy(contents)
+
+        for content in cleaned_contents:
+            parts = content["parts"]
+            for part in parts:
+                if "functionResponse" in part:
+                    function_response_data = part["functionResponse"]
+                    function_response_part = FunctionResponse(**function_response_data)
+                    function_response_part.id = None
+                    part["functionResponse"] = function_response_part.model_dump(
+                        exclude_none=True
+                    )
+
+        return cleaned_contents
 
     def _construct_url(self, model: str, api_base: Optional[str] = None) -> str:
         """
@@ -20,7 +52,6 @@ class GoogleAIStudioTokenCounter:
         base_url = api_base or "https://generativelanguage.googleapis.com"
         return f"{base_url}/v1beta/models/{model}:countTokens"
 
-        
     async def validate_environment(
         self,
         api_base: Optional[str] = None,
@@ -33,7 +64,8 @@ class GoogleAIStudioTokenCounter:
         Returns a Tuple of headers and url for the Google Gen AI Studio countTokens endpoint.
         """
         from litellm.llms.gemini.google_genai.transformation import GoogleGenAIConfig
-        headers =  GoogleGenAIConfig().validate_environment(
+
+        headers = GoogleGenAIConfig().validate_environment(
             api_key=api_key,
             headers=headers,
             model=model,
@@ -54,7 +86,7 @@ class GoogleAIStudioTokenCounter:
     ) -> Dict[str, Any]:
         """
         Count tokens using Google Gen AI Studio countTokens endpoint.
-        
+
         Args:
             contents: The content to count tokens for (Google Gen AI format)
                     Example: [{"parts": [{"text": "Hello world"}]}]
@@ -63,7 +95,7 @@ class GoogleAIStudioTokenCounter:
             api_base: Optional API base URL (defaults to Google Gen AI Studio)
             timeout: Optional timeout for the request
             **kwargs: Additional parameters
-            
+
         Returns:
             Dict containing token count information from Google Gen AI Studio API.
             Example response:
@@ -77,14 +109,13 @@ class GoogleAIStudioTokenCounter:
                     }
                 ]
             }
-            
+
         Raises:
             ValueError: If API key is missing
             litellm.APIError: If the API call fails
             litellm.APIConnectionError: If the connection fails
             Exception: For any other unexpected errors
         """
-        # Set up API base URL
 
         # Prepare headers
         headers, url = await self.validate_environment(
@@ -94,44 +125,39 @@ class GoogleAIStudioTokenCounter:
             model=model,
             litellm_params=kwargs,
         )
-        
-        # Prepare request body
-        request_body = {
-            "contents": contents
-        }
-        
+
+        # Prepare request body - clean up contents to remove unsupported fields
+        cleaned_contents = self._clean_contents_for_gemini_api(contents)
+        request_body = {"contents": cleaned_contents}
+
         async_httpx_client = get_async_httpx_client(
             llm_provider=LlmProviders.GEMINI,
         )
 
         try:
             response = await async_httpx_client.post(
-                url=url,
-                headers=headers,
-                json=request_body
+                url=url, headers=headers, json=request_body
             )
-            
+
             # Check for HTTP errors
             response.raise_for_status()
-            
+
             # Parse response
             result = response.json()
             return result
-                
+
         except httpx.HTTPStatusError as e:
             error_msg = f"Google Gen AI Studio API error: {e.response.status_code} - {e.response.text}"
             raise litellm.APIError(
                 message=error_msg,
                 llm_provider="gemini",
                 model=model,
-                status_code=e.response.status_code
+                status_code=e.response.status_code,
             ) from e
         except httpx.RequestError as e:
             error_msg = f"Request to Google Gen AI Studio failed: {str(e)}"
             raise litellm.APIConnectionError(
-                message=error_msg,
-                llm_provider="gemini",
-                model=model
+                message=error_msg, llm_provider="gemini", model=model
             ) from e
         except Exception as e:
             error_msg = f"Unexpected error during token counting: {str(e)}"

tests/test_litellm/llms/gemini/test_gemini_common_utils.py

@@ -157,4 +157,82 @@ class TestGoogleAIStudioTokenCounter:
             mock_acount_tokens.assert_called_once_with(
                 model=model_to_use,
                 contents=contents
-            )
+            )
+
+    def test_clean_contents_for_gemini_api_removes_id_field(self):
+        """Test that _clean_contents_for_gemini_api removes unsupported 'id' field from function responses"""
+        from litellm.llms.gemini.count_tokens.handler import GoogleAIStudioTokenCounter
+        
+        token_counter = GoogleAIStudioTokenCounter()
+        
+        # Test contents with function response containing 'id' field (camelCase)
+        contents_with_id = [
+            {
+                "parts": [
+                    {
+                        "text": "Hello world"
+                    }
+                ],
+                "role": "user"
+            },
+            {
+                "parts": [
+                    {
+                        "functionResponse": {
+                            "id": "read_many_files-1757526647518-730a691aac11c",  # This should be removed
+                            "name": "read_many_files",
+                            "response": {
+                                "output": "No files matching the criteria were found or all were skipped."
+                            }
+                        }
+                    }
+                ],
+                "role": "user"
+            }
+        ]
+        
+        # Clean the contents
+        cleaned_contents = token_counter._clean_contents_for_gemini_api(contents_with_id)
+        
+        # Verify the 'id' field was removed
+        function_response = cleaned_contents[1]["parts"][0]["functionResponse"]
+        assert "id" not in function_response
+        assert "name" in function_response
+        assert "response" in function_response
+        assert function_response["name"] == "read_many_files"
+        assert function_response["response"]["output"] == "No files matching the criteria were found or all were skipped."
+
+
+    def test_clean_contents_for_gemini_api_preserves_other_fields(self):
+        """Test that _clean_contents_for_gemini_api preserves other fields and structure"""
+        from litellm.llms.gemini.count_tokens.handler import GoogleAIStudioTokenCounter
+        
+        token_counter = GoogleAIStudioTokenCounter()
+        
+        # Test contents without function responses
+        contents_without_function_response = [
+            {
+                "parts": [
+                    {
+                        "text": "This is a regular message"
+                    }
+                ],
+                "role": "user"
+            },
+            {
+                "parts": [
+                    {
+                        "text": "This is a model response"
+                    }
+                ],
+                "role": "model"
+            }
+        ]
+        
+        # Clean the contents
+        cleaned_contents = token_counter._clean_contents_for_gemini_api(contents_without_function_response)
+        
+        # Verify the contents are unchanged
+        assert cleaned_contents == contents_without_function_response
+
+