fix: DuckDuckGo image search tool error (#5606)

api/core/tools/provider/builtin/duckduckgo/tools/ddgo_img.py

@@ -19,7 +19,11 @@ class DuckDuckGoImageSearchTool(BuiltinTool):
             "max_results": tool_parameters.get('max_results'),
         }
         response = DDGS().images(**query_dict)
-        results = []
+        result = []
         for res in response:
-            results.append(self.create_image_message(image=res.get("image")))
-        return results
+            msg = ToolInvokeMessage(type=ToolInvokeMessage.MessageType.IMAGE_LINK,
+                                    message=res.get('image'),
+                                    save_as='',
+                                    meta=res)
+            result.append(msg)
+        return result

api/core/tools/tool_engine.py

@@ -2,7 +2,7 @@ import json
 from copy import deepcopy
 from datetime import datetime, timezone
 from mimetypes import guess_type
-from typing import Union
+from typing import Any, Union
 
 from yarl import URL
 
@@ -250,7 +250,7 @@ class ToolEngine:
         agent_message: Message,
         invoke_from: InvokeFrom,
         user_id: str
-    ) -> list[tuple[MessageFile, bool]]:
+    ) -> list[tuple[Any, str]]:
         """
         Create message file
 
@@ -291,7 +291,7 @@ class ToolEngine:
             db.session.refresh(message_file)
 
             result.append((
-                message_file,
+                message_file.id,
                 message.save_as
             ))