The import funnel across data sources: items_collected, promoted, duplicate, stoplisted, disqualified, failed, promotion_rate, last_collected_at over the filtered sources' items in a period (on items.created_at; the filter scopes source rows). group_by status | type | object_type adds groups[] per value: the promotion rate per source type is group_by type. aggregated.counts are source-row counts. One source's live funnel: get_data_source with data_source_items_counts; not the activity feed.

Contract:

• MCP tool get_data_sources_metrics, registry package mcp.playtables/data_sources, mount playtables.sources.
• Operation metrics, response envelope metrics.
• Flags: read only.