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What it means

Aeris support staff can enter a view-as session to reproduce a customer issue. Those sessions are read-only by policy — no mutating tool can run, regardless of scope or plan — to prevent support work from silently changing a customer’s campaigns. End users will not see this error in normal usage. It fires only when an admin session tries to mutate.

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How to fix

  • Exit the view-as session and act as the intended user.
  • If you need to make a change on the customer’s behalf, coordinate with them and have them run the tool, or take control via the standard support-approved path.

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Response envelope

{
  "ok": false,
  "error_envelope": {
    "code": "VIEWER_READ_ONLY",
    "message": "Writes are disabled while viewing another advertiser.",
    "docs_url": "https://tryaeris.ai/docs/mcp/errors/viewer-read-only",
    "retryable": false,
    "retry_after_ms": null,
    "details": {}
  }
}
details is empty for this code.