Pii Scan

Before writing files or after tool calls that produce data, call the check_output MCP tool to scan for PII and secrets:

• connector_type: codex.Write (for file writes), codex.Bash (for command output), or the appropriate tool type
• message: the text content to scan — for file writes, scan the content being written

Before file writes: If the content being written contains PII (SSN, credit card, email, phone, etc.), check_output will return a redacted_message. Write the redacted version instead of the original, or warn the user that the content contains sensitive data.

After tool output: If tool output contains PII, use the redacted_message version in your response instead of the original.

If the response shows allowed: false, do not write the file or include the output in your response.

Note: For Bash/exec_command tool calls, PII scanning is handled automatically by the PostToolUse hook. This skill covers Write, Edit, and other non-Bash operations where hooks cannot intercept.

Source: hashgraph-online/awesome-codex-plugins → plugins/getaxonflow/axonflow-codex-plugin/skills/pii-scan/SKILL.md