Editing Openai/694057b6-101c-8007-9a65-c40578c7252d (section)

====== If no structured tool_calls are present but the model is expected to call tools, the worker uses a BIOS-enforced convention, for example: ======
* A tool call is represented as a single JSON object (or JSON line) that includes: - {"tool": "<name>", "arguments": { ... }} - optionally with a stable prefix/suffix marker if you choose to enforce one.

Fallback parsing rules:
* Attempt parsing only when the accumulated assistant output contains a clearly delimited tool-call candidate.
* If parsed tool name is in normal tools: - treat it as a normal tool call - strip the tool-call directive from the user-visible output (so the final result isn’t polluted)
* If tool name is in exit tools: - record signal - optionally strip directive from output (recommended)
* If parsing fails or tool name unknown: - FAILED(reason="tool_parse_error") (preserve output as-is for debugging)

This fallback logic should be isolated in tooling.py and unit-tested heavily.