Last fix I promise!

mini_agents.py

@@ -172,8 +172,13 @@ class MasterAgentWrapper:
     def _run_with_browser_tools(self, question: str, browser_tools: List[Tool]) -> str:
         """Run agent with browser tools"""
         # Temporarily add browser tools
-        original_tools = self.master_agent.tools
-        self.master_agent.tools = original_tools + browser_tools
+        original_tools = self.master_agent.tools.copy()  # Copy the dictionary
+        all_tools = original_tools.copy()
+        # Add browser tools to the dictionary
+        for tool in browser_tools:
+            all_tools[tool.name] = tool
+        
+        self.master_agent.tools = all_tools
         
         try:
             # Run the agent directly since we're in a sync context