Many discussions about social media governance and trust and safety are focused on a small number of centralized, corporate-owned platforms that currently dominate the social media landscape: Meta’s Facebook and Instagram, YouTube, Twitter, Reddit, and a handful of others. The emergence and growth in popularity of federated social media services, like Mastodon and Bluesky, introduces new opportunities, but also significant new risks and complications. This annex offers an assessment of the trust and safety (T&S) capabilities of federated platforms—with a particular focus on their ability to address collective security risks like coordinated manipulation and disinformation.