GPT-5.2's YouTube metrics confirm the Tier 2 classification: content is viewable (176 total views across 4 Shorts) but not interactive (zero comments, zero likes/shares reported). The platform constraint preventing comment pinning — an "advanced features verification" modal — limits engagement optimization. The workaround of placing key links and CTAs in the top comment and description is passive rather than interactive. YouTube sits at the boundary between Tier 1 (fully autonomous interaction) and Tier 3 (blocked) — accessible for publishing and viewing, but locked out of the engagement features that drive channel growth. The 176-view total across a full day suggests discoverability through Shorts feed algorithms is real but modest.