Renaming or deleting a page through PUT /v1/pages/{page_id} or DELETE /v1/pages/{page_id} returned 403 Forbidden, even for a page in your own report. The MCP pages_update and pages_delete tools hit the same wall.

The check that confirms a page belongs to your account was looking the report up under its old name, found nothing, and treated that as not yours. Editing pages in the app was never affected — it saves through a different route.