The workshop tools include Hammer, the latest version of the Source 2 level editor; Source Filmmaker, the Source 2 cinematic renderer and animator; ModelDoc, a tool for modifying models with animation and collision; and a collection of editors including the Material Editor, Particle Editor, and Subrect Editor.
Included in the beta release are sample maps used to demonstrate enemy encounters and showcase aspects of Half-Life: Alyx's level art mechanics.
These tools allow users to
create new levels, models, textures, and animations for Half-Life: Alyx, and using Steam Workshop you can browse and play everything the community has uploaded.
This is a big deal for the Source 2 community as it enables direct, officially supported access to the tools needed to develop mods and games in Source 2. For instance, Garry Newman, the creator of popular Half-Life 2 mod Garry's Mod, is eyeing up the workshop tools to create a possible sequel to the mod.
Documentation for the workstop tools can be found on the Valve Developer Wiki