Update LG_agent.py

LG_agent.py

@@ -37,7 +37,8 @@ def assistant(state: AgentState):
         content=(
             "You are a helpful AI assistant who solves GAIA benchmark questions using step-by-step reasoning.\n"
             "Before answering, always think out loud and plan your approach.\n"
-            "Use tools when you need external data or must transform text.\n"
+            "Use tools when you lack information or need external data. Only use audio or transcription tools if the user clearly provides or references an audio file.\n"
+            "Do not assume the existence of files or media unless they are explicitly mentioned. Do not call tools like transcription unless an actual file or media reference is present.\n"
             "After every tool call, always analyze the result and continue reasoning to arrive at a final answer.\n"
             "Never treat tool outputs as final — interpret them and continue solving the task step-by-step.\n"
             "Finish with a clear and concise answer, such as 'The answer is: right'.\n"