fix: remove double-wrapping of tools_cachepoint_config in _format_tools

`__init__` already calls `_validate_and_format_cache_point` which wraps
the user-supplied `{"type": "default"}` into `{"cachePoint": {"type": "default"}}`.
`_format_tools` was then wrapping it a second time, producing a nested
`{"cachePoint": {"cachePoint": {...}}}` that Bedrock rejects with ParamValidationError.

Fixes #3181

Author: SyedShahmeerAli12

integrations/amazon_bedrock/src/haystack_integrations/components/generators/amazon_bedrock/chat/utils.py

@@ -93,7 +93,7 @@ def _format_tools(
         )
 
     if tools_cachepoint_config:
-        tool_specs.append({"cachePoint": tools_cachepoint_config})
+        tool_specs.append(tools_cachepoint_config)
 
     return {"tools": tool_specs}
 

integrations/amazon_bedrock/tests/test_chat_generator_utils.py

@@ -67,7 +67,7 @@ def tools():
 
 class TestAmazonBedrockChatGeneratorUtils:
     def test_format_tools(self, tools):
-        formatted_tool = _format_tools(tools, tools_cachepoint_config={"type": "default"})
+        formatted_tool = _format_tools(tools, tools_cachepoint_config={"cachePoint": {"type": "default"}})
         assert formatted_tool == {
             "tools": [
                 {