GTM API / Search mass-actions

List the team's bulk runs with filter, sort and cursor pagination. Filter by title (eq / in, or q to search it), status (active / paused), paused_reason, target_entity, canary_satisfied_at (is_null:true = the canary gate is still closed), or the created / updated / started / settled time ranges. status is a CONTROL axis, not an outcome: to learn how a run went call get_mass_actions_metrics or get_mass_action with include=metrics. Stopped runs are excluded unless deleted_at is filtered explicitly. page_size:0 returns the count alone. Contract: - MCP tool search_mass_actions, registry package mcp.orchestration/mass_actions, mount orchestration.mass_actions. - Operation search, response envelope search. - Flags: read only.