Reduced max_tokens for Gemini agent

agent.py

@@ -169,7 +169,7 @@ class GeminiAgent:
             api_key     = GOOGLE_API_KEY, 
             temperature = 0.0,
             top_p       = 1.0,  
-            max_tokens  = 4098,
+            max_tokens  = 2048,
             timeout     = 120   # Add timeout to prevent hanging
             )
         # If native, we can optionally remove image_to_text from tools to prevent the agent from getting confused