diff --git a/litellm/responses/mcp/chat_completions_handler.py b/litellm/responses/mcp/chat_completions_handler.py
index b914bb1e4aa..764fe003f2c 100644
--- a/litellm/responses/mcp/chat_completions_handler.py
+++ b/litellm/responses/mcp/chat_completions_handler.py
@@ -453,7 +453,10 @@ async def acompletion_with_mcp(
                 )
 
                 # Make follow-up call with streaming
-                follow_up_call_args: Final = LiteLLM_Proxy_MCP_Handler._prepare_chained_call_params(self.base_call_args)
+                follow_up_call_args: Final = LiteLLM_Proxy_MCP_Handler._prepare_follow_up_call_params(
+                    self.base_call_args,
+                    original_stream_setting=True,
+                )
                 follow_up_call_args["messages"] = follow_up_messages
                 follow_up_call_args["stream"] = True
                 # Ensure follow-up call doesn't trigger MCP handler again
@@ -625,7 +628,10 @@ async def acompletion_with_mcp(
     )
 
     # Make follow-up call with original stream setting
-    follow_up_call_args: Final = LiteLLM_Proxy_MCP_Handler._prepare_chained_call_params(base_call_args)
+    follow_up_call_args: Final = LiteLLM_Proxy_MCP_Handler._prepare_follow_up_call_params(
+        base_call_args,
+        original_stream_setting=stream,
+    )
     follow_up_call_args["messages"] = follow_up_messages
     follow_up_call_args["stream"] = stream
 
diff --git a/litellm/responses/mcp/litellm_proxy_mcp_handler.py b/litellm/responses/mcp/litellm_proxy_mcp_handler.py
index d72f335e89c..07e192e68b4 100644
--- a/litellm/responses/mcp/litellm_proxy_mcp_handler.py
+++ b/litellm/responses/mcp/litellm_proxy_mcp_handler.py
@@ -72,7 +72,9 @@ class LiteLLM_Proxy_MCP_Handler:
     """
 
     @staticmethod
-    def _prepare_chained_call_params(params: Mapping[str, Any]) -> dict[str, Any]:
+    def _prepare_chained_call_params(
+        params: Mapping[str, Any],
+    ) -> dict[str, Any]:  # mutable-ok: returns a sanitized copy for the next provider call
         """Copy request params without state owned by the previous LLM call.
 
         MCP auto-execution keeps the trace identifier so chained rounds remain
@@ -1264,7 +1266,7 @@ class LiteLLM_Proxy_MCP_Handler:
         Restores the original streaming setting and removes tool_choice since
         we're now providing tool results, not requesting tool calls.
         """
-        follow_up_params: Final = call_params.copy()
+        follow_up_params: Final = LiteLLM_Proxy_MCP_Handler._prepare_chained_call_params(call_params)
 
         # Restore original streaming setting for follow-up call
         follow_up_params["stream"] = original_stream_setting
diff --git a/tests/test_litellm/responses/mcp/test_litellm_proxy_mcp_handler.py b/tests/test_litellm/responses/mcp/test_litellm_proxy_mcp_handler.py
index c552170a599..de889421e1c 100644
--- a/tests/test_litellm/responses/mcp/test_litellm_proxy_mcp_handler.py
+++ b/tests/test_litellm/responses/mcp/test_litellm_proxy_mcp_handler.py
@@ -444,12 +444,13 @@ async def test_execute_tool_calls_uses_unique_call_ids_and_preserves_parent_cont
     assert all(item["metadata"]["parent_litellm_call_id"] == "cid" for item in captured)
 
 
-def test_prepare_chained_call_params_resets_per_call_logging_state():
+def test_prepare_follow_up_call_params_resets_per_call_logging_state():
     original = {
         "model": "gpt-4",
         "litellm_call_id": "parent-call",
         "litellm_logging_obj": object(),
         "litellm_trace_id": "trace-1",
+        "tool_choice": "auto",
         "litellm_params": {
             "litellm_call_id": "nested-parent-call",
             "litellm_logging_obj": object(),
@@ -457,13 +458,15 @@ def test_prepare_chained_call_params_resets_per_call_logging_state():
         },
     }
 
-    follow_up = LiteLLM_Proxy_MCP_Handler._prepare_chained_call_params(original)
+    follow_up = LiteLLM_Proxy_MCP_Handler._prepare_follow_up_call_params(original, original_stream_setting=True)
 
     assert "litellm_call_id" not in follow_up
     assert "litellm_logging_obj" not in follow_up
     assert "litellm_call_id" not in follow_up["litellm_params"]
     assert "litellm_logging_obj" not in follow_up["litellm_params"]
     assert follow_up["litellm_trace_id"] == "trace-1"
+    assert follow_up["stream"] is True
+    assert "tool_choice" not in follow_up
     assert follow_up["litellm_params"]["metadata"] == {"team": "legal"}
     assert original["litellm_call_id"] == "parent-call"