qwen2.5:3b emits tool calls in text shapes the parser dropped, breaking
two reviewer-reported behaviours:
- `getWeather: {"location": "Seoul"}` (a JSON object after the colon) was
dumped wholesale into {"query": "{...}"}, so `location` never reached the
tool. getWeather then ran with empty args, returned the auto-detected
location's weather, the model noticed the mismatch and retried — looping up
to 8 times before giving up with an English error. Now the JSON object after
the colon is parsed directly as the argument dict.
- `call_stop: {"id":..., "function": {"name": "setBroadcast",
"arguments": "{\"action\": \"stop\"}"}}` — a single tool_call object without
the `tool_calls: [...]` array wrapper, behind a `call_xxx:` label — matched
no form, so the raw JSON leaked to the user AND setBroadcast never ran
("방송 꺼줘" did nothing). Now name + arguments are pulled from the embedded
`function` object when the name is in the allow-list.
Field-captured from the live qwen2.5:3b brain (2026-06-12). Tests cover both
shapes, non-ASCII args, dict/string arguments, and unknown-tool rejection.
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