From 118176f21a4a1d5c950f4ce295fec5f7b9460e3b Mon Sep 17 00:00:00 2001
From: Mateo Wang <277851410+mateo-berri@users.noreply.github.com>
Date: Sat, 6 Jun 2026 20:34:31 -0700
Subject: [PATCH] refactor(bedrock): build Converse toolSpec via a
 BedrockToolSpec dict subclass (#29869)

---
 .../prompt_templates/factory.py               | 30 +++++++------------
 litellm/types/llms/bedrock.py                 | 30 +++++++++++++++++++
 2 files changed, 40 insertions(+), 20 deletions(-)

diff --git a/litellm/litellm_core_utils/prompt_templates/factory.py b/litellm/litellm_core_utils/prompt_templates/factory.py
index 588a183d58..81a4c8b14b 100644
--- a/litellm/litellm_core_utils/prompt_templates/factory.py
+++ b/litellm/litellm_core_utils/prompt_templates/factory.py
@@ -3653,17 +3653,13 @@ from litellm.types.llms.bedrock import ContentBlock as BedrockContentBlock
 from litellm.types.llms.bedrock import DocumentBlock as BedrockDocumentBlock
 from litellm.types.llms.bedrock import ImageBlock as BedrockImageBlock
 from litellm.types.llms.bedrock import SourceBlock as BedrockSourceBlock
+from litellm.types.llms.bedrock import BedrockToolSpec
 from litellm.types.llms.bedrock import ToolBlock as BedrockToolBlock
-from litellm.types.llms.bedrock import (
-    ToolInputSchemaBlock as BedrockToolInputSchemaBlock,
-)
-from litellm.types.llms.bedrock import ToolJsonSchemaBlock as BedrockToolJsonSchemaBlock
 from litellm.types.llms.bedrock import SearchResultBlock
 from litellm.types.llms.bedrock import ToolResultBlock as BedrockToolResultBlock
 from litellm.types.llms.bedrock import (
     ToolResultContentBlock as BedrockToolResultContentBlock,
 )
-from litellm.types.llms.bedrock import ToolSpecBlock as BedrockToolSpecBlock
 from litellm.types.llms.bedrock import ToolUseBlock as BedrockToolUseBlock
 from litellm.types.llms.bedrock import VideoBlock as BedrockVideoBlock
 
@@ -5554,22 +5550,16 @@ def _bedrock_tools_pt(
         normalize_json_schema_custom_types_to_object(parameters)
         if parameters.get("type") not in _valid_json_schema_root_types:
             parameters["type"] = "object"
-        json_schema = BedrockToolJsonSchemaBlock(
-            type=parameters["type"],
-            properties=parameters.get("properties", {}),
-            required=parameters.get("required", []),
+        tool_block = cast(
+            BedrockToolBlock,
+            BedrockToolSpec(
+                name=name,
+                description=description,
+                parameters=parameters,
+                strict=tool.get("function", {}).get("strict", None),
+                supports_strict_tools=supports_strict_tools,
+            ),
         )
-        additional_properties = parameters.get("additionalProperties", None)
-        if supports_strict_tools and additional_properties is not None:
-            json_schema["additionalProperties"] = additional_properties
-        tool_input_schema = BedrockToolInputSchemaBlock(json=json_schema)
-        tool_spec = BedrockToolSpecBlock(
-            inputSchema=tool_input_schema, name=name, description=description
-        )
-        strict = tool.get("function", {}).get("strict", None)
-        if supports_strict_tools and strict is not None:
-            tool_spec["strict"] = strict
-        tool_block = BedrockToolBlock(toolSpec=tool_spec)
         tool_block_list.append(tool_block)
 
         ## ADD CACHE POINT TOOL BLOCK ##
diff --git a/litellm/types/llms/bedrock.py b/litellm/types/llms/bedrock.py
index ed80b44414..fa8c3a93ef 100644
--- a/litellm/types/llms/bedrock.py
+++ b/litellm/types/llms/bedrock.py
@@ -285,6 +285,36 @@ class ToolBlock(TypedDict, total=False):
     cachePoint: Optional[CachePointBlock]
 
 
+class BedrockToolSpec(dict):
+    def __init__(
+        self,
+        *,
+        name: str,
+        description: str,
+        parameters: dict,
+        strict: Optional[bool],
+        supports_strict_tools: bool,
+    ) -> None:
+        json_schema: ToolJsonSchemaBlock = {
+            "type": parameters["type"],
+            "properties": parameters.get("properties", {}),
+            "required": parameters.get("required", []),
+        }
+        additional_properties = parameters.get("additionalProperties")
+        if supports_strict_tools and additional_properties is not None:
+            json_schema["additionalProperties"] = additional_properties
+
+        tool_spec: ToolSpecBlock = {
+            "inputSchema": {"json": json_schema},
+            "name": name,
+            "description": description,
+        }
+        if supports_strict_tools and strict is not None:
+            tool_spec["strict"] = strict
+
+        super().__init__(toolSpec=tool_spec)
+
+
 class SpecificToolChoiceBlock(TypedDict):
     name: str