[BUG] Improper Flagging of Usage Policy Violation

[SaitoPhoenix]

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Description

When providing a simple, multi-step prompt instructing the model to use a Task tool for basic file I/O and data manipulation, the API incorrectly returns a Usage Policy violation error.

This appears to be a false positive, as the prompt's content is entirely benign and is a standard test case for agentic tool-use (reading a file, processing data, and formatting output).

Additional Context

This prompt is a foundational test for agentic capabilities. The inability to execute such a simple, harmless task due to a false positive safety refusal severely hinders development and testing of tool-use features. The prompt contains no malicious, harmful, or inappropriate content.

What Should Happen?

The model should activate its Task tool, read the file, perform the data manipulation, and return a successful response in the requested format.

Example: ORIGNAL DATA: 1234, REVERSED DATA: 4321

Error Messages/Logs

API Error: Claude Code is unable to respond to this request, which appears to violate our Usage Policy
    (https://www.anthropic.com/legal/aup). Please double press esc to edit your last message or start a new session for
    Claude Code to assist with a different task. If you are seeing this refusal repeatedly, try running /model
    claude-sonnet-4-20250514 to switch models.

Steps to Reproduce

1. Create a file named TEST.md in the current working directory with the following content:

   # Test Document
   
   DATA: 1234
   

2. From the Claude Code CLI, submit the following prompt:

   Use the Task tool to execute the following steps exactly as written: 
    1. Read TEST.md 
    2. Reverse the order of the numbers in the DATA field. 
    3. Respond with the following format: "ORIGNAL DATA: <original data>, REVERSED DATA: <reversed data>"
   

Claude Model

Sonnet (default)

Is this a regression?

No, this never worked

Last Working Version

No response

Claude Code Version

2.0.30

Platform

Anthropic API

Operating System

Ubuntu/Debian Linux

Terminal/Shell

VS Code integrated terminal

Additional Information

No response