Added a check to ensure the input text is a string before proceeding with parsing (#22809)

Co-authored-by: -LAN- <laipz8200@outlook.com>

api/core/workflow/nodes/tool/tool_node.py

@@ -317,7 +317,13 @@ class ToolNode(BaseNode):
             elif message.type == ToolInvokeMessage.MessageType.FILE:
                 assert message.meta is not None
                 assert isinstance(message.meta, dict)
-                assert "file" in message.meta and isinstance(message.meta["file"], File)
+                # Validate that meta contains a 'file' key
+                if "file" not in message.meta:
+                    raise ToolNodeError("File message is missing 'file' key in meta")
+
+                # Validate that the file is an instance of File
+                if not isinstance(message.meta["file"], File):
+                    raise ToolNodeError(f"Expected File object but got {type(message.meta['file']).__name__}")
                 files.append(message.meta["file"])
             elif message.type == ToolInvokeMessage.MessageType.LOG:
                 assert isinstance(message.message, ToolInvokeMessage.LogMessage)