Ticket #75 PR #25 Review: pass_audit approved Implementation of set_agent_status MCP tool for orchestrator. Clean, focused scope with exactly 3 files changed. Security review passed: - Orchestrator-only authorization enforced ✓ - Human agent status protection ✓ - Project isolation enforced ✓ - Status enum validation ✓ Test coverage: 7 comprehensive scenarios, all passing Bonus: Fixed inconsistency where list_members role enum was missing "planner" type that already exists in Agent model.