diff --git a/litellm/llms/bedrock/messages/invoke_transformations/anthropic_claude3_transformation.py b/litellm/llms/bedrock/messages/invoke_transformations/anthropic_claude3_transformation.py
index 81225159a7c..fa5002fcad8 100644
--- a/litellm/llms/bedrock/messages/invoke_transformations/anthropic_claude3_transformation.py
+++ b/litellm/llms/bedrock/messages/invoke_transformations/anthropic_claude3_transformation.py
@@ -129,6 +129,37 @@ class AmazonAnthropicClaudeMessagesConfig(
                                 if isinstance(cache_control, dict) and "ttl" in cache_control:
                                     cache_control.pop("ttl", None)
 
+    def _get_tool_search_beta_header_for_bedrock(
+        self,
+        model: str,
+        tool_search_used: bool,
+        programmatic_tool_calling_used: bool,
+        input_examples_used: bool,
+        beta_set: set,
+    ) -> None:
+        """
+        Adjust tool search beta header for Bedrock.
+        
+        Bedrock requires a different beta header for tool search on Opus 4 models
+        when tool search is used without programmatic tool calling or input examples.
+        
+        Note: On Amazon Bedrock, server-side tool search is only supported on Claude Opus 4
+        with the `tool-search-tool-2025-10-19` beta header.
+        
+        Ref: https://platform.claude.com/docs/en/agents-and-tools/tool-use/tool-search-tool
+        
+        Args:
+            model: The model name
+            tool_search_used: Whether tool search is used
+            programmatic_tool_calling_used: Whether programmatic tool calling is used
+            input_examples_used: Whether input examples are used
+            beta_set: The set of beta headers to modify in-place
+        """
+        if tool_search_used and not (programmatic_tool_calling_used or input_examples_used):
+            beta_set.discard(ANTHROPIC_TOOL_SEARCH_BETA_HEADER)
+            if "opus-4" in model.lower() or "opus_4" in model.lower():
+                beta_set.add("tool-search-tool-2025-10-19")
+
     def transform_anthropic_messages_request(
         self,
         model: str,
@@ -189,13 +220,13 @@ class AmazonAnthropicClaudeMessagesConfig(
         )
         beta_set.update(auto_betas)
 
-        if (
-            tool_search_used
-            and not (programmatic_tool_calling_used or input_examples_used)
-        ):
-            beta_set.discard(ANTHROPIC_TOOL_SEARCH_BETA_HEADER)
-            if "opus-4" in model.lower() or "opus_4" in model.lower():
-                beta_set.add("tool-search-tool-2025-10-19")
+        self._get_tool_search_beta_header_for_bedrock(
+            model=model,
+            tool_search_used=tool_search_used,
+            programmatic_tool_calling_used=programmatic_tool_calling_used,
+            input_examples_used=input_examples_used,
+            beta_set=beta_set,
+        )
 
         if beta_set:
             anthropic_messages_request["anthropic_beta"] = list(beta_set)