Query Roblox instances: get, children, find child/descendant, wait for child, class info, search by name/class. [PRO] file_tree, project_structure, descendants, ancestors, search by property/tag.

Create, delete, clone, move, rename, or pivot instances. [PRO] create_tree, mass_create, mass_delete, mass_duplicate, smart_duplicate.

Get/set properties, attributes, and tags on instances. [PRO] set_calculated, set_relative, mass_set, mass_get, modify_children.

Manage script source code: read, write, create, delete, edit lines, search. [PRO] replace across scripts.

Create / update / verify Roblox in-game UI (ScreenGui / Frame / TextLabel / …). Always start a new UI task with the design_brief action — it accepts an omitted or partial brief, inspects Studio context, then returns a current-state summary, recommended mode/change scopes, candidate brief patches, and one user-facing confirmation or clarification question. design_brief may return asset recommendation candidates from existing UI images, user references, or conservative manage_assets.search results; do not use a recommended asset until the user accepts it. Do not dump enum lists at the user; map natural language to internal purpose/platform/tone values through recommendations, and only finalize identity-defining fields after the user accepts a recommendation or provides equivalent intent. Read MCP resource weppy://ui-studio/guide for the full guide; it is split into Floor (non-negotiable accessibility), Vocabulary (style menu — pick ONE family per dimension; do not blend everything), Direction (brief → choices), and Tree encoding (Roblox property JSON shapes). Floor essentials suggested by Design Check (check): (1) mobile touch target ≥ 44 px (2) text contrast ≥ 4.5:1 (3) prefer explicit TextSize over TextScaled (4) respect platform safe zones (5) warn on full-screen opaque roots for non-modal purposes. Style is brief-driven; reject the default AI look (uniform 8 px corners + generic blue + glass card + Gotham everywhere) — each game deserves its own visual identity.

[PRO] Configure environment: lighting, atmosphere, sky, terrain properties, time of day.

Get, set, or clear selection. [PRO] context, details, add/remove items, watch changes.

Camera operations: get info, focus on instance/position, suggest view, capture Edit-mode viewport screenshot (Edit mode only; not usable during playtest).

[PRO] Tween service: create, play, pause, cancel tweens for smooth animations.

[PRO] Audio management: play, stop, pause, resume sounds. Set audio listener.

[PRO] Animation: load, play, stop animations. Get animation tracks from humanoid/controller.

[PRO] Physics collision groups: register, set collidable between groups, list groups.

[PRO] Particle effects: emit particles, clear all particles, toggle effect enabled state.

[PRO] Terrain operations: fill shapes, clear regions, replace materials, manage colors, read/write voxels, generate procedural terrain, smooth terrain.

[PRO] Spatial queries: raycast, find ground, check placement, multi-raycast, scan area, find flat areas, find spawn positions, analyze walkable, spatial map, find empty space, get bounds, snap to grid, check collision.

[PRO] Asset management: insert models by ID, get asset info, search creator store, insert free models/packages, export selection.

[PRO] Project sync management: status, history, direction settings, read/write synced files.

[PRO] Workspace state: full sync, snapshot, recent changes, viewport info, clear history, metadata, scripts, selection info, clear cache.

Output logs: get filtered logs, poll incrementally with sinceSeq cursor, clear buffer, get recent errors.

System info: ping, connection status, usage tier. [PRO] place info, services list, studio settings, playtest control, automated test runner.

Control Roblox Studio editor view/rendering settings for screenshot and QA workflows. Use it to toggle Studio session-level View settings such as UI preview; it does not edit game UI objects or their properties.

[PRO] Execute multiple commands in a single batch. Each command is an object with "tool" name and "args". Commands execute sequentially; optionally continue on error.

[PRO] Execute arbitrary Luau code in Roblox Studio sandbox. Blocked services: HttpService, DataStoreService, MessagingService. Cannot access CoreGui/CorePackages.