Heista's creative direction engine — same engine the Creative Director specialist runs internally, exposed over MCP. ONE-SHOT: give a brief, get N finished creative outputs. For back-and-forth refinement, or output shapes the `medium` enum below does not cover, use chat_with_creative_worlds instead.
OUTPUT SHAPE switches on the `medium` arg:
• omitted → N territory cards (default exploration). Each card sits on different psychology / craft / feel / world axis coordinates so the set spans the creative space rather than orbiting one insight. Card has: name, campaign line, 5-8 sentence pitch, one-sentence strategic bet, resolved axis state names, creative-director rationale.
• `tvc` → N TVC scripts (15-90s — hook, arc, resolve, sound design, end line).
• `billboard` / `ooh` / `print` → N out-of-home concepts (visual concept + line + placement rationale).
• `social` → N social-video concepts (hook + format type + middle beat + payoff, optimised for Reels / TikTok / Shorts).
• `activation` / `experiential` → N activation concepts (space design + user journey + peak moment + takeaway artifact).
• `audio` → N sonic / radio concepts (sonic scene + voice + audio arc).
• `campaign` → N full campaign platforms (insight → big idea → strategy → visual world → production roadmap).
The engine can also produce manifesto / copy, naming, packaging, PR stunts, content series, brand positioning, partnerships — these output shapes are NOT in the medium enum, so use chat_with_creative_worlds when the user wants one of those.
USE WHEN: user says "give me ideas / options / directions / territories", "what angles work for...", "show me three / five ways to...", "write a TVC for...", "draft billboard concepts for...", "I need fresh thinking on...". DO NOT USE to refine one existing direction (use chat tool), to critique work, for OKRs / internal docs / strategy decks, or anything outside advertising creative direction.
INPUTS: brief (the creative problem, free text), count (2-6 concepts), optional brand_id (from list_brands or any create_powersource_* — when provided the engine grounds output in the brand's buyer tensions, voice, and selling points), optional medium (above), optional lens_hint (apply a playbook or signature move as a creative constraint), idempotency_key (safely retryable for 5 minutes).
Returns the finished creative output as narrative text PLUS a structured array of resolved axis coordinates for programmatic use. Metered — typically 3-15 credits per call depending on count and brand context size. Charged after success on actual token usage.
