fix: Add properties to extracted_content object in browser tool schema

The OpenAI API was rejecting function declarations due to empty properties in
the extracted_content object type. This fix adds required properties to comply
with OpenAI's schema requirements:

- Add 'text' property for storing extracted page content
- Add 'metadata' object with 'source' property for content attribution
- Maintain existing functionality while satisfying API schema validation

Error resolved:
"GenerateContentRequest.tools[0].function_declarations[0].parameters.properties[extracted_content].properties: should be non-empty for OBJECT type"

app/tool/browser_use_tool.py

@@ -15,7 +15,6 @@ from app.llm import LLM
 from app.tool.base import BaseTool, ToolResult
 from app.tool.web_search import WebSearch
 
-
 _BROWSER_DESCRIPTION = """
 Interact with a web browser to perform various actions such as navigation, element interaction, content extraction, and tab management. This tool provides a comprehensive set of browser automation capabilities:
 
@@ -448,6 +447,22 @@ Page content:
                                         "extracted_content": {
                                             "type": "object",
                                             "description": "The content extracted from the page according to the goal",
+                                            "properties": {
+                                                "text": {
+                                                    "type": "string",
+                                                    "description": "Text content extracted from the page",
+                                                },
+                                                "metadata": {
+                                                    "type": "object",
+                                                    "description": "Additional metadata about the extracted content",
+                                                    "properties": {
+                                                        "source": {
+                                                            "type": "string",
+                                                            "description": "Source of the extracted content",
+                                                        }
+                                                    },
+                                                },
+                                            },
                                         }
                                     },
                                     "required": ["extracted_content"],