// MCP TOOL REFERENCE

THREEJS DEVTOOLS TOOLS

60 tools from the Threejs Devtools MCP Server, categorised by risk level.

View the Threejs Devtools policy → Token cost: 7,546 tokens →

// ALL 60 THREEJS DEVTOOLS TOOLS

READ 33 tools

Read animation_details List all AnimationMixers, their actions, clips, weights, and playback state Read annotated_screenshot Screenshot with labeled object names overlaid at their screen positions. Shows [M]esh, [L]ight, [G]roup, [C... Read bridge_status Check bridge connection and proxy status Read camera_details Get active camera properties: type, position, FOV, near/far, aspect Read console_capture Capture browser console output (log/warn/error). Returns last N messages. Call to check for runtime errors ... Read dispose_check Find potential memory leaks: orphaned geometries/textures not in scene but tracked by renderer, hidden obje... Read env_map_details Inspect environment maps: scene.environment, scene.background, per-material envMap, IBL settings Read find_objects Search scene objects by type, material, visibility, name pattern, or custom property. Returns matching obje... Read fog_details Get scene fog settings: type (Fog/FogExp2), color, near/far or density Read geometry_details Inspect geometry: vertices, attributes, indices, bounding box, morph attributes Read gltf_to_r3f Convert a GLTF/GLB file to a ready-to-use React Three Fiber component (like gltfjsx) Read instanced_mesh_details Inspect an InstancedMesh: count, max instances, geometry, sample transforms, custom attributes, instance co... Read layer_details Show camera layer mask and objects with non-default layer assignments Read material_details Get full properties of a material: color, maps, uniforms, defines Read material_list List all materials in the scene with type, color, transparency Read memory_stats Detailed GPU memory analysis: geometry buffers, texture VRAM, instance data, top textures by size Read morph_targets List all meshes with morph targets, their target names and current influence values Read object_details Get detailed info about a specific object by name, uuid, or path Read perf_monitor Record FPS and frame times for N seconds. Returns avg/min/max FPS, percentiles, spike and jank counts. Read postprocessing_list List post-processing passes from EffectComposer: render passes, shader passes, effects (bloom, SSAO, etc.) Read raycast Cast a ray from camera through screen coordinates and return hit objects Read renderer_info Get renderer stats: draw calls, triangles, memory, capabilities Read renderer_settings Get renderer configuration: toneMapping, exposure, colorSpace, shadowMap, pixelRatio Read scene_background Inspect scene background, environment map (IBL), color management, backgroundBlurriness/Intensity Read scene_diff Compare scene state over time. First call saves a snapshot, second call shows what changed (added/removed/m... Read shader_list List all compiled shader programs with their material associations Read shader_source Get compiled vertex/fragment shader source and uniforms for a material Read shadow_details Inspect shadow maps: global settings, per-light shadow config (bias, mapSize, camera frustum), cast/receive... Read skeleton_details List all skeletons/bones from SkinnedMesh objects in the scene Read take_screenshot Capture a screenshot of the current Three.js scene Read texture_details Get detailed info about a specific texture Read texture_list List all textures: size, format, wrap, filter settings Read texture_preview Preview a specific texture as a PNG image. Use texture_list first to find names/UUIDs.

WRITE 20 tools

DESTRUCTIVE 5 tools

Destructive bounding_boxes Show/hide axis-aligned bounding boxes for scene objects. Runtime only — for debugging frustum culling and o... Destructive highlight_object Highlight an object for debugging (wireframe or visibility toggle). Runtime only — for visual inspection, n... Destructive remove_helper Remove a previously added debug helper Debug only — page reload will reset. No code changes needed. Destructive toggle_overlay Toggle a lightweight scene inspector overlay in the browser. Shows real-time FPS, draw calls, triangles, ob... Destructive toggle_wireframe Toggle wireframe on all materials or a specific object. Runtime only — for visual debugging. Debug only — ...

EXECUTE 2 tools

Execute performance_snapshot Get detailed performance analysis: draw calls, triangles, instanced meshes, object counts by type Execute run_js Execute arbitrary JavaScript with access to scene, renderer, camera. Returns the result. Runtime only (lost...

// RUNNING THIS SERVER

The managed route: connect Threejs Devtools through the PolicyLayer gateway — every tool call above is checked against your policy before it runs, with a full audit log.

DIRECT INSTALL (UNMANAGED) npx -y threejs-devtools-mcp

// FAQ

How many tools does the Threejs Devtools MCP server have? +

The Threejs Devtools MCP server exposes 60 tools across 4 categories: Read, Write, Destructive, Execute.

How do I enforce policies on Threejs Devtools tools? +

Route the Threejs Devtools server through the PolicyLayer gateway. Define allow, deny, or approval rules per tool in the dashboard — they are enforced on every call before it reaches the server.

What risk categories do Threejs Devtools tools fall into? +

Threejs Devtools tools are categorised as Read (33), Write (20), Destructive (5), Execute (2). Each category has a recommended default policy.

Let agents act without letting them run wild.

Route your MCP servers through PolicyLayer and every tool call is checked against your policy before it runs — allow, deny, or require approval. Per-identity grants. Full audit log. Live in minutes.

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