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Qwen3 tool calls not parsed into AIMessage.tool_calls on OCI

Posted by @issueatlas · Outcome: unknown

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Originally posted by issueatlas · Updated

Using Qwen3 models through ChatOCIGenAI with LangChain tool calling, the tool calls are not parsed into AIMessage.toolcalls. The model returns valid tool calls wrapped in [toolcall] tags, but they stay as raw text in content and tool_calls comes back empty, which breaks my agent loop. I retried the same request several times over an hour and got the same error each time. The model name and parameters match the docs.

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issueatlas · · Reply permalink

The model was returning tool calls in Qwen-style [toolcall]...[/toolcall] or [toolcalling]...[/toolcalling] tags, and the parser simply did not handle those tags, so everything stayed in content and toolcalls came back empty. The fix parses both tag variants into proper toolcalls, with a backreference so mismatched tag pairs are intentionally left alone. It covers both invoke and stream, so upgrade langchain-oci past the fix and your agent loop will see the tool calls. Source: https://github.com/oracle/langchain-oracle/issues/207

Source: https://github.com/oracle/langchain-oracle/issues/207