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Python: Respect FunctionChoiceBehavior filters in OpenAI responses agent tools #13235

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Python: Respect FunctionChoiceBehavior filters in OpenAI responses agent tools #13235

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30d70c1
Fix function choice behavior handling in ResponsesAgentThreadActions
ymuichiro Oct 8, 2025
57d215d
Merge branch 'main' into feat/respect-function-choice-filters
moonbox3 Oct 17, 2025
4839a4b
Fix: avoid NotImplementedError when function_choice filters are non-d…
ymuichiro Oct 17, 2025
03c73c0
Merge branch 'feat/respect-function-choice-filters' of https://github…
ymuichiro Oct 17, 2025
d3148ff
Merge branch 'main' into feat/respect-function-choice-filters
moonbox3 Oct 23, 2025
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17 changes: 13 additions & 4 deletions python/semantic_kernel/agents/open_ai/responses_agent_thread_actions.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1209,10 +1209,19 @@ def _get_tools(
if agent.tools:
tools.extend(agent.tools)

# TODO(evmattso): make sure to respect filters on FCB
if kernel.plugins:
funcs = kernel.get_full_list_of_function_metadata()
tools.extend([kernel_function_metadata_to_response_function_call_format(f) for f in funcs])
if not function_choice_behavior.enable_kernel_functions:
return tools

if not kernel.plugins:
return tools

funcs = (
kernel.get_list_of_function_metadata(function_choice_behavior.filters)
if function_choice_behavior.filters
else kernel.get_full_list_of_function_metadata()
)

tools.extend([kernel_function_metadata_to_response_function_call_format(f) for f in funcs])

return tools

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5 changes: 3 additions & 2 deletions python/tests/unit/agents/openai_responses/test_openai_responses_thread_actions.py
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Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,7 @@

from semantic_kernel.agents.open_ai.openai_responses_agent import OpenAIResponsesAgent
from semantic_kernel.agents.open_ai.responses_agent_thread_actions import ResponsesAgentThreadActions
from semantic_kernel.connectors.ai.function_choice_behavior import FunctionChoiceBehavior
from semantic_kernel.contents.chat_message_content import ChatMessageContent
from semantic_kernel.contents.streaming_chat_message_content import StreamingChatMessageContent
from semantic_kernel.contents.streaming_text_content import StreamingTextContent
Expand Down Expand Up @@ -499,11 +500,11 @@ async def mock_invoke_function_call(*args, **kwargs):

def test_get_tools(mock_agent, kernel, custom_plugin_class):
kernel.add_plugin(custom_plugin_class)

fcb = FunctionChoiceBehavior()
tools = ResponsesAgentThreadActions._get_tools(
agent=mock_agent,
kernel=kernel,
function_choice_behavior=MagicMock(),
function_choice_behavior=fcb,
)

assert len(tools) == len(mock_agent.tools) + len(kernel.get_full_list_of_function_metadata())
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