From 8745f355a485cf9e3db12d5df20161ec62aa24cf Mon Sep 17 00:00:00 2001
From: mateo-berri <277851410+mateo-berri@users.noreply.github.com>
Date: Mon, 20 Jul 2026 19:30:26 -0700
Subject: [PATCH] fix(bedrock_mantle): log additional_tools hoist at debug
 level

---
 .../bedrock_mantle/responses/transformation.py    |  6 ++++++
 ...est_bedrock_mantle_responses_transformation.py | 15 +++++++++++++++
 2 files changed, 21 insertions(+)

diff --git a/litellm/llms/bedrock_mantle/responses/transformation.py b/litellm/llms/bedrock_mantle/responses/transformation.py
index 9ee19f7f4f2..eb818b26f1f 100644
--- a/litellm/llms/bedrock_mantle/responses/transformation.py
+++ b/litellm/llms/bedrock_mantle/responses/transformation.py
@@ -177,6 +177,12 @@ class BedrockMantleResponsesAPIConfig(BedrockMantleAuthMixin, OpenAIResponsesAPI
             return input, []
         remaining_input = [item for item in input if not cls._is_codex_additional_tools_item(item)]
         hoisted_tools = [tool for item in additional_tools_items for tool in cls._tools_of_additional_tools_item(item)]
+        verbose_logger.debug(
+            "Bedrock Mantle Responses API: hoisting %d tool(s) out of %d 'additional_tools' input item(s) "
+            "into the top-level tools param (Mantle rejects that input item type).",
+            len(hoisted_tools),
+            len(additional_tools_items),
+        )
         return remaining_input, cls._filter_unsupported_tools(hoisted_tools)
 
     def map_openai_params(
diff --git a/tests/test_litellm/llms/bedrock_mantle/test_bedrock_mantle_responses_transformation.py b/tests/test_litellm/llms/bedrock_mantle/test_bedrock_mantle_responses_transformation.py
index bf36454ad72..a40e2e33809 100644
--- a/tests/test_litellm/llms/bedrock_mantle/test_bedrock_mantle_responses_transformation.py
+++ b/tests/test_litellm/llms/bedrock_mantle/test_bedrock_mantle_responses_transformation.py
@@ -495,6 +495,21 @@ class TestBedrockMantleCodexAdditionalTools:
         assert body["input"] == [self._USER_MESSAGE]
         assert "tools" not in body
 
+    def test_hoist_is_logged_at_debug_level(self):
+        from unittest.mock import patch
+
+        with patch(
+            "litellm.llms.bedrock_mantle.responses.transformation.verbose_logger.debug"
+        ) as mock_debug:
+            self._transform(
+                input=[
+                    {"type": "additional_tools", "role": "developer", "tools": self._CODEX_TOOLS},
+                    self._USER_MESSAGE,
+                ]
+            )
+        assert mock_debug.call_count == 1
+        assert "additional_tools" in str(mock_debug.call_args)
+
 
 class TestBedrockMantleResponsesRegistry:
     def test_registry_returns_config_for_gpt_5_5(self, local_cost_map):