Python: Strip tools from FoundryAgent request when agent_reference is present#5101
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moonbox3 merged 2 commits intomicrosoft:mainfrom Apr 8, 2026
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… present _prepare_options() now removes tools, tool_choice, and parallel_tool_calls from run_options after injecting agent_reference. The Foundry API rejects requests containing both fields. FunctionTools are still invoked client-side by the function invocation layer. Fixes microsoft#5087 Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
eavanvalkenburg
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chetantoshniwal
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Summary
FoundryAgentreturns HTTP 400 when bothagent_referenceandtoolsare present in the serialized request body. The parent classRawOpenAIChatClient._prepare_options()addstoolstorun_optionsat_chat_client.py:1193, but_prepare_options()in the Foundry subclass never strips it before returning. The Foundry API rejects requests containing both fields.Changes
RawFoundryAgentChatClient._prepare_options(), add.pop()calls to removetools,tool_choice, andparallel_tool_callsfromrun_optionsafter injectingagent_reference. FunctionTools are still invoked client-side by the function invocation layer.test_raw_foundry_agent_chat_client_prepare_options_strips_toolsverifying that tools are absent from the returned options whileagent_referenceis preserved.Testing
_prepare_optionsto return dict withtools/tool_choice/parallel_tool_calls, asserts all three are stripped andagent_referenceremains inextra_bodytest_raw_foundry_agent_chat_client_prepare_options_accepts_function_toolsstill passesFixes #5087
This contribution was developed with AI assistance (Claude Code).