Deliverability check

Template

If more than one brand is reachable, call `list_brands` and pass `brand` on every call. Call `get_deliverability` for the last 28 completed days versus the preceding 28, then `detect_anomalies` with channels=["klaviyo_email"]. Report Gmail versus Outlook daily-bucket open engagement deltas in percentage points, bounce-type mix trends, spam-complaint spikes and campaign/provider/message evidence. Use query on klaviyo_deliverability_daily for daily bounce-type trends and klaviyo_deliverability_collection for missing coverage. Disclose freshness, unknown providers, unresolved ownership, missing native metrics and incomplete coverage. Never interpret unmeasured flow bounce/spam as zero. Provider dates use event occurrence; campaign trends use send date and may not reconcile. Rates are fractions; daily unique engagement is not deduplicated across the period.