diff --git a/.gitignore b/.gitignore
index 83edc3d..b471fc8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,4 +5,6 @@ __pycache__
 .vscode
 node_modules
 .wrangler
-.pytest_cache
\ No newline at end of file
+.pytest_cache
+*.jpg
+*.json
\ No newline at end of file
diff --git a/models.py b/models.py
index 11eb949..44887d9 100644
--- a/models.py
+++ b/models.py
@@ -10,16 +10,14 @@ class ImageGenerationRequest(BaseModel):
 
 class FunctionParameter(BaseModel):
     type: str
-    properties: Dict[str, Dict[str, str]]
+    properties: Dict[str, Dict[str, Union[str, Dict[str, str]]]]
     required: List[str]
 
-# 定义 Function 模型
 class Function(BaseModel):
     name: str
     description: str
     parameters: Optional[FunctionParameter] = Field(default=None, exclude=None)
 
-# 定义 Tool 模型
 class Tool(BaseModel):
     type: str
     function: Function
@@ -58,6 +56,13 @@ class Message(BaseModel):
     class Config:
         extra = "allow"  # 允许额外的字段
 
+class FunctionChoice(BaseModel):
+    name: str
+
+class ToolChoice(BaseModel):
+    type: str
+    function: Optional[FunctionChoice] = None
+
 class RequestModel(BaseModel):
     model: str
     messages: List[Message]
@@ -72,5 +77,5 @@ class RequestModel(BaseModel):
     frequency_penalty: Optional[float] = 0.0
     n: Optional[int] = 1
     user: Optional[str] = None
-    tool_choice: Optional[str] = None
+    tool_choice: Optional[Union[str, ToolChoice]] = None
     tools: Optional[List[Tool]] = None
\ No newline at end of file
diff --git a/request.py b/request.py
index 800a3fe..765c66f 100644
--- a/request.py
+++ b/request.py
@@ -474,19 +474,21 @@ async def get_vertex_claude_payload(request, engine, provider):
             tools.append(json_tool)
         payload["tools"] = tools
         if "tool_choice" in payload:
-            if payload["tool_choice"]["type"] == "auto":
-                payload["tool_choice"] = {
-                    "type": "auto"
-                }
-            if payload["tool_choice"]["type"] == "any":
-                payload["tool_choice"] = {
-                    "type": "any"
-                }
-            if payload["tool_choice"]["type"] == "function":
-                payload["tool_choice"] = {
-                    "type": "tool",
-                    "name": payload["tool_choice"]["function"]["name"]
-                }
+            if isinstance(payload["tool_choice"], dict):
+                if payload["tool_choice"]["type"] == "function":
+                    payload["tool_choice"] = {
+                        "type": "tool",
+                        "name": payload["tool_choice"]["function"]["name"]
+                    }
+            if isinstance(payload["tool_choice"], str):
+                if payload["tool_choice"] == "auto":
+                    payload["tool_choice"] = {
+                        "type": "auto"
+                    }
+                if payload["tool_choice"] == "none":
+                    payload["tool_choice"] = {
+                        "type": "any"
+                    }
 
     if provider.get("tools") == False:
         payload.pop("tools", None)
@@ -746,19 +748,21 @@ async def get_claude_payload(request, engine, provider):
             tools.append(json_tool)
         payload["tools"] = tools
         if "tool_choice" in payload:
-            if payload["tool_choice"]["type"] == "auto":
-                payload["tool_choice"] = {
-                    "type": "auto"
-                }
-            if payload["tool_choice"]["type"] == "any":
-                payload["tool_choice"] = {
-                    "type": "any"
-                }
-            if payload["tool_choice"]["type"] == "function":
-                payload["tool_choice"] = {
-                    "type": "tool",
-                    "name": payload["tool_choice"]["function"]["name"]
-                }
+            if isinstance(payload["tool_choice"], dict):
+                if payload["tool_choice"]["type"] == "function":
+                    payload["tool_choice"] = {
+                        "type": "tool",
+                        "name": payload["tool_choice"]["function"]["name"]
+                    }
+            if isinstance(payload["tool_choice"], str):
+                if payload["tool_choice"] == "auto":
+                    payload["tool_choice"] = {
+                        "type": "auto"
+                    }
+                if payload["tool_choice"] == "none":
+                    payload["tool_choice"] = {
+                        "type": "any"
+                    }
 
     if provider.get("tools") == False:
         payload.pop("tools", None)
diff --git a/test/test_nostream.py b/test/test_nostream.py
index 7378d7c..0ae7642 100644
--- a/test/test_nostream.py
+++ b/test/test_nostream.py
@@ -45,7 +45,6 @@ def get_model_response(image_base64):
     ]
 
     payload = {
-
         "model": "claude-3-5-sonnet",
         "messages": [
             {
@@ -64,7 +63,7 @@ def get_model_response(image_base64):
                 ]
             }
         ],
-        "stream": True,
+        # "stream": True,
         "tools": tools,
         "tool_choice": {"type": "function", "function": {"name": "extract_underlined_text"}},
         "max_tokens": 300
@@ -117,5 +116,5 @@ def main(image_path):
         print("\n無法解析回應。")
 
 if __name__ == "__main__":
-    image_path = "00001 (8).jpg"  # 替換為您的圖像路徑
+    image_path = "1.jpg"  # 替換為您的圖像路徑
     main(image_path)
\ No newline at end of file