Based on the information I know, Sequoia Capital is a venture capital firm, not an agent of TikTok. Sequoia Capital is a global venture capital firm that has invested in many well-known technology companies, including Google, Apple, WhatsApp, etc. They provide financial and strategic support to startups in their early stages.

TikTok is a short video platform developed and operated by ByteDance. ByteDance is a world-renowned technology company that also owns several other social media and content platforms, such as Toutiao and TikTok.

Although Sequoia Capital is an important venture capital firm, there is no evidence that they are an agent of TikTok. If you have a specific interest or need for an agent of TikTok, it is recommended that you contact TikTok's official channels directly or conduct further investigation and understanding.