Amazon gutted its order confirmation emails to keep Gmail's AI agents from reading your purchases.

Since early summer, Amazon order emails list item counts instead of naming items (The Verge). The reason is defensive: detailed receipts were feeding purchase history to assistants living in the inbox, notably Google's, turning a transactional email into a competitor's personalization signal. Expect much more of this. If agents read email, email becomes an intentionally lossy channel, and anyone building on inbox parsing should assume the data degrades from here.