diff --git a/verl/experimental/agent_loop/tool_agent_loop.py b/verl/experimental/agent_loop/tool_agent_loop.py
index e107bb37b51..c16fa12a63d 100644
--- a/verl/experimental/agent_loop/tool_agent_loop.py
+++ b/verl/experimental/agent_loop/tool_agent_loop.py
@@ -179,7 +179,7 @@ async def run(self, sampling_params: dict[str, Any], **kwargs) -> AgentLoopOutpu
             else None,
             num_turns=agent_data.user_turns + agent_data.assistant_turns + 1,
             metrics=agent_data.metrics,
-            extra_fields={},
+            extra_fields=dict(agent_data.extra_fields),
         )
         output.extra_fields.update({"turn_scores": agent_data.turn_scores, "tool_rewards": agent_data.tool_rewards})
         return output