[Bug] Anthropic API Error: Unexpected Refusal on Valid Request

**Bug Description**
The bio refusal on request ID req_011Cf5UndbCXo4wbrvGS8zr8 is ridiculous.

**Environment Info**
- Platform: linux
- Terminal: gnome-terminal
- Version: 2.1.272
- Feedback ID: 1c419ced-89ad-4ef9-acea-1c8a2b61cd0d

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

**Prompt**

> Create a multi-step PlasmoDB search to identify potential transmission-blocking vaccine targets that act to prevent fertilization, maturation and/or midgut invasion in the mosquito gut.

Start by reproducing the exact PlasmoDB search prompt in the reported Claude Code environment on Linux and use request ID req_011Cf5UndbCXo4wbrvGS8zr8 to inspect the refusal. No source file or test is named; done means determining whether the refusal is unexpected and identifying a confirmed correction or actionable diagnosis.

Written by the indexing model from the issue text.