The Qwen models, especially when quantized, can be really bad about just trying things and seeing what works. If you’re not watching all the tool calls you may not see it, but it’s kind of scary to watch them just bump into wrong decisions and backtrack.

They also have a bad habit of accidentally building URLs that hit Alibaba infrastructure, likely because their training environment had them use those URLs. If you haven’t watched the outgoing network requests you might be very surprised at what your Qwen agents do sometimes.