Debug logs can become another copy of sensitive spreadsheet data. Record enough context to diagnose the operation without dumping full rows, credentials, or private contact fields.
Inventory what is logged
Inspect Logger, console, custom logging sheets, and exception handling. A complete response or serialized row can include information far beyond the field being investigated.
Review execution logs, Cloud Logging, and Error Reporting separately. Google describes different persistence and access arrangements, so a short-lived editor log should not be treated as the only place data was recorded.
Use minimal diagnostic fields
Prefer a safe run ID, operation name, target category, counts, elapsed time, and redacted error classification. Avoid email addresses and raw cell contents when they are unnecessary for troubleshooting.
Google provides temporary active-user keys for some diagnostic correlation without directly recording the user’s identity. Use such mechanisms only within the relevant access and retention policy, rather than inventing a permanent public identifier.
Verify access and exception paths
Run a small synthetic-data test and inspect normal and failed executions. An exception can include request content or a URL with credentials even when ordinary log statements were carefully limited.
Restrict log access to authorized maintainers and follow the applicable retention process. If credentials were exposed, use the approved incident response and credential-rotation procedure rather than merely hiding the message in the editor. Do not delete evidence indiscriminately during an investigation. Document what was recorded, where it may persist, and which remediation was verified. A private spreadsheet does not automatically make every associated diagnostic destination equally restricted.
References
- Logging | Apps Script | Google for Developers
- Authorization for Google Services | Apps Script | Google for Developers
Reviewed against the linked official product guidance on November 3, 2026. Features, limits, screen labels, and access can vary by account, platform, region, and organization policy.