The Foundry service rejects requests that include tool declarations when an
agent is specified (HTTP 400 invalid_payload, "Not allowed when agent is
specified."). RawFoundryAgentChatClient._prepare_options stripped tools,
tool_choice, and parallel_tool_calls only on the non-preview path, so when
allow_preview=True (where the agent identity is bound on the OpenAI client via
get_openai_client(agent_name=...)) the tool fields were still sent and the call
failed.
This client always targets a pre-provisioned agent, so it must never send tool
declarations. Drop the tool fields unconditionally and log a single warning
when the caller supplied tools, noting they are used only for client-side
function dispatch. The non-agent FoundryChatClient (model-based) is unaffected.
Fixes#5130.
Co-authored-by: Eduard van Valkenburg <eavanvalkenburg@users.noreply.github.com>
Vaibhav Patel
23bfa49575