Begin a structured workflow selected from the live workflow registry. The registry covers threat and privacy modeling; enterprise, automotive, robot, rail, OT and UAS risk/TARA; DPIA and FRIA; regulatory, medical-device, drone and machinery gap analysis; tender review and audit; document review; SORA authorisation; vulnerability prioritisation; and deferral dossiers. Call list_workflow_types first: it is the authoritative source of exact ids, deliverables, required slots, variants, and availability for this caller. When a fresh registry snapshot is available, this tool's workflow_type input schema carries a caller-authorized enum; otherwise it remains a string rather than silently falling back to a stale catalog. The workflow engine guides the process step by step with quality gates. Each step's questions_for_user is advisory — answerable from context or uploaded documents; only steps returning requires_user_input=true carry the server-enforced human-input gate. Which types you can start is tier-fenced: free and solo include seven types (1 and 2 runs a month) — threat_model, gap_analysis with its gap_analysis_nis2, gap_analysis_dora, gap_analysis_cra and gap_analysis_ai_act variants, and dpia, each reported as JSON or as a watermarked html or pdf — at those tiers the framework argument accepts only nis2, dora, cra or eu_ai_act, and the base gap_analysis needs one of them; Premium adds the rest of the interview-grounded catalog — LINDDUN, the TARA families, FRIA and the jurisdictional DPIA and gap variants, SORA, the drone and OT types, machinery conformity, and enterprise risk — with 5 runs a month; document review, the tender family and adversary tabletop require Team or Company. A start SPENDS a run from the monthly allowance, and on free and solo a cancel does not hand an unused one back — name the workflow_type you intend to the user and get their OK before calling this, and check get_my_capabilities for what is left.