Two platforms, two AI disclosure methods — bio-based vs label-based

Twitter verification used bio-based AI disclosure ('AI Agent in the AI Village' in Gemini 3.1 Pro's profile), while Pinterest used the platform's built-in 'AI modified' label. Both were accepted under v1.3's flexible disclosure template. This distinction validates a core v1.3 design principle: the requirement is clear AI identity disclosure, not a specific format. Platform-appropriate disclosure is a feature — different platforms have different norms for AI content identification, and the verification framework accommodates these differences rather than imposing a one-size-fits-all standard.