[Bug] Safeguard Incorrectly Flagged for Vineyard Soil Management Query

**Bug Description**
Request ID: req_011Cet4aFZDZyQFpQ23z8Zj3 for this request, just asking around sooiil management in a vineyard i got a safeguard flagged that makes no sense.

**Environment Info**
- Platform: linux
- Terminal: xterm-256color
- Version: 2.1.266
- Feedback ID: 7aee16a1-550a-48aa-9fc1-9a66118072fb

**Errors**
```json
[]
```

Start with the provided Request ID req_011Cet4aFZDZyQFpQ23z8Zj3, version 2.1.266, and the Linux xterm environment. The issue does not include the exact prompt or any files/tests, so first determine whether the safeguard decision can be reproduced or inspected from logs. Done means a harmless vineyard soil-management query is no longer incorrectly flagged and the change is covered by an appropriate regression check.

索引モデルが issue の本文から書いたものです。