maya-mcp
maya-mcp lets Claude control a live Autodesk Maya session in natural language — building, animating, importing and rendering 3D scenes, with RAG doc search, safety scanning, and optional AI 3D generation.
Primitives & assets: create cubes/spheres/cylinders/cones/planes/torus, assign materials (lambert/blinn/phong/aiStandardSurface), create lights and cameras.
Modeling: transform (move/rotate/scale, world or relative), extrude, bevel, booleans, combine, separate, smooth.
Animation: keyframe any attribute (translate/rotate/scale/visibility) with tangent control (auto/linear/flat/spline/step).
I/O: import OBJ, FBX, GLB/GLTF, Alembic, MA/MB and BVH mocap; reference files with version swap, load/unload lifecycle.
Rendering & review: instant viewport PNG/JPG grabs, Arnold ray-traced stills via out-of-process kick, deterministic colour-managed 360° turntable playblasts.
Session & scripting: ping/launch Maya, new/save scene, list objects, scene snapshot, delete, run arbitrary Python, create shelf buttons.
Pipeline integration: drive the native ShotGrid Toolkit publisher (preview/publish), read an opt-in durable audit log.
Knowledge engine: hybrid RAG search across maya.cmds, PyMEL, Arnold, USD and anti-patterns corpora; save learned patterns; report token/RAG efficiency stats.
Optional AI generation: Vision3D image-to-3D and text-to-3D, AI texturing, poll/download/import results; World Labs Marble image-to-Gaussian-splat environments converted and loaded for Arnold.
Safety: 14+ dangerous-pattern detectors before code reaches Maya, undo chunks for rollback, and model trust gates on knowledge writes.
Provides tools for creating, manipulating, and managing 3D scenes in Autodesk Maya, including primitive creation, material assignment, transformations, lighting, cameras, mesh operations, keyframing, file import, viewport capture, session management, and more.
Click on "Deploy Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type
@followed by the MCP server name and your instructions, e.g., "@maya-mcpcreate a red sphere and a blue cube"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
maya-mcp
Control Autodesk Maya with natural language using Claude and the Model Context Protocol (MCP)
Experimental project — use at your own risk. This is an independent, unofficial experiment created with Claude Code. It is not affiliated with, endorsed by, or officially supported by Autodesk in any way. The Maya name and trademarks belong to Autodesk, Inc.
Executing AI-generated code inside a live Maya session carries real risks: unexpected crashes, loss of unsaved work, unintended modifications to scenes, rigs, or assets. Always work on a duplicate or test scene. Never run this on production material without a full backup. The author(s) accept no responsibility for data loss, corruption, or any other damage resulting from its use.
📊 Code knowledge graph
Interactive, auto-published map of this codebase — modules, functions, call/import edges and community clusters — rebuilt by graphify and deployed to GitHub Pages on every push to src/:
abrahamadsk.github.io/maya-mcp · part of the MCP ecosystem graph hub.
MCP server for Autodesk Maya — 17 MCP tools with RAG-powered documentation search, anti-hallucination safety, self-learning patterns, and optional AI-driven 3D generation via the Vision3D addon.
Related MCP server: Maya MCP Server
Features
Production Maya Operations
Beyond primitives, maya-mcp handles real production tasks: polygon modeling (extrude, bevel, boolean, combine, smooth), animation keyframing with tangent control, multi-format I/O (OBJ, FBX, GLTF, Alembic, USD, MA/MB), viewport capture/playblast, full scene snapshots, and shelf button creation. All operations use undo chunks for safe rollback.
AI-Powered 3D Generation (optional addon)
Optionally integrates with Vision3D for image-to-3D and text-to-3D generation. Non-blocking async workflow: submit job → poll status → download results → import into Maya. Runs on a remote GPU server so your local machine stays responsive. Vision3D is not required — maya-mcp works fully without it.
Embedded Maya Console Panel
A dockable Qt panel that lives inside Maya as a workspaceControl tab (next to the Attribute Editor). Provides a chat interface to Claude with live Maya context (scene name, object count, selection, renderer). Installs automatically — the first time Claude connects to Maya (via maya_ping or maya_launch), the MCP Pipeline menu and panel are injected into the running Maya session. No manual userSetup.py editing required. The panel persists across Maya sessions — if left open, it auto-restores on next launch. Uses PySide2 (Maya 2023–2024) or PySide6 (Maya 2025+) automatically via a compatibility shim. All MCP servers (maya-mcp, fpt-mcp, flame-mcp) are accessible from the panel through Claude Code CLI.
Cross-MCP Orchestration
Works alongside fpt-mcp (ShotGrid/Flow Production Tracking) and flame-mcp (Autodesk Flame). Each DCC has its own embedded console, and all consoles access all MCP servers via Claude Code CLI. When multiple servers are configured, Claude can orchestrate end-to-end VFX workflows across applications. Consistent architecture across all three servers.
Review & Colour Management
Review previews are colour-correct and deterministic. The Viewport 2.0 capture paths (review_turntable, maya_viewport_capture) pin the colour-management view transform before the playblast and restore it after, so a version preview matches the viewport instead of riding the session's current view. The view is configurable (config.json → review_view_transform, default Un-tone-mapped (sRGB) — the view of Maya's built-in default OCIO config). For Arnold file renders, color_policy.py (and docs/ARNOLD_API.md) provide a preview-vs-EXR policy: bake the output transform for an 8-bit preview, but force the driver to Raw for scene-linear EXRs — the guardrail that keeps a display transform out of the EXRs the comp/Flame stage consumes.
Architecture
Claude / LLM
↕ MCP protocol (stdio)
FastMCP server (src/maya_mcp/server.py) — 17 MCP tools
├── RAG engine (src/maya_mcp/rag/)
│ ├── ChromaDB + BM25 hybrid search
│ ├── HyDE adaptive query expansion
│ └── In-session cache + RRF fusion
├── Safety module (src/maya_mcp/safety.py)
│ └── 14+ dangerous pattern detectors
├── Maya bridge (src/maya_mcp/maya_bridge.py)
│ └── TCP socket → Command Port :8100
└── Vision3D client (HTTP)
└── GPU server for 3D generationTools (17 MCP tools)
Maya Direct Tools (10 tools)
Tool | Description |
| Create cube / sphere / cylinder / cone / plane / torus |
| Create and assign material (lambert / blinn / phong / aiStandardSurface) |
| Move / rotate / scale with world/object space and relative mode |
| Create directional / point / spot / area / ambient lights |
| Create cameras with focal length and look-at target |
| Extrude, bevel, boolean (union/diff/intersect), combine, separate, smooth |
| Keyframe any attribute with tangent control (auto/linear/flat/spline/step) |
| Import OBJ, FBX, GLB/GLTF, Alembic, MA/MB, BVH mocap with namespace and scale (streams progress; 120s budget for heavy assets, 240s for BVH) |
| Reference files and manage the reference lifecycle: create, list, replace (version swap), load, unload. Keeps the live link to the source file that |
| Playblast screenshot to PNG/JPG at any resolution |
Dispatcher Tools (3 tools)
Tool | Description |
| Session lifecycle + generic Maya ops (see action table below) |
| Optional Vision3D addon (see action table below) |
| Optional World Labs (Marble) addon — image→Gaussian-splat environment, convert + load into Maya for Arnold (see action table below) |
RAG & Intelligence (4 tools)
Tool | Description |
| Hybrid RAG search across 5 Maya API corpora with relevance scores |
| Save validated working patterns for future sessions (with trust gates) |
| Token efficiency report: RAG savings, safety blocks, patterns learned, p_fallo |
| Zero the session counters immediately (manual companion to the 30-min idle auto-reset) |
Maya Session Dispatcher (maya_session — 12 actions)
Action | Description |
| Verify connection, returns Maya version and scene info |
| Open Maya and wait for Command Port to respond (streams progress while waiting) |
| New empty scene (refuses if the scene has unsaved changes; pass confirm=true to discard them) |
| Save current scene |
| List scene objects with type and name filters |
| Full scene state: file, renderer, object counts, plugins, units |
| Delete objects with safety checks on wildcards |
| Execute arbitrary Python in Maya (safety scanning; optional timeout param up to 600s with 10s progress heartbeats) |
| Create reusable shelf buttons with custom Python commands |
| Read recent durable-audit records (read-only; requires MAYA_AUDIT_LOG=1). Optional filters: limit, tool, action, status |
| Drive the native Toolkit publisher (tk-multi-publish2) inside an engine'd Maya launched via tank. mode preview/publish, include/exclude intent tokens, comment, timeout. Captures dependencies automatically. |
| Deterministic Viewport 2.0 turntable playblast to a .mov (long op, runs in Maya). Frames the model, orbits 360° over start–end at the given fps, 16:9 / square pixels / overscan, offscreen (never Arnold), colour-managed (the review view transform is pinned and restored so the preview matches the viewport). Needs out_path (resolve via fpt tk_resolve_path, template movie_asset_publish); returns the mov plus a Version code Asset_Task to name the review Version after its task. |
| Single-frame Arnold ray-traced still to a PNG at the exact out_path (long op). This is what "a still" means — a real render, not the Viewport 2.0 grab that maya_viewport_capture does. Maya only exports a |
Vision3D Dispatcher (maya_vision3d — 7 actions, optional, requires Vision3D)
Action | Description |
| Set the Vision3D server URL for the rest of this MCP session (runtime-only, asked from the user in the chat) |
| Check availability and model status of the selected server |
| Image-to-3D generation (full pipeline) |
| Text-to-3D generation |
| Texture an existing mesh with AI |
| Poll async job status |
| Download completed results to local disk |
Skills (3)
Tools are what the server can do. Skills are the recipe — which tools, in
what order, and what fails silently. They live in docs/skills/,
version controlled with the code they describe, and load only when the request
matches their trigger, so they cost almost nothing until they are relevant.
Skill | Fires on |
| Heavy or crash-prone work that should leave the Command Port: batch renders, cache export/import, multi-file sweeps |
| References — create/replace/version-swap, namespaces, deferred refs, and the save-after-scripted-open trap |
| Retarget and character animation: HumanIK, mocap/BVH, cycles and loops, reach semantics |
Activate them on a fresh clone by symlinking into your user skills directory:
for s in maya-headless-batch maya-scene-assembly maya-anim-transfer; do
ln -s "$PWD/docs/skills/$s" ~/.claude/skills/"$s"
doneSee docs/skills/README.md for the four-layer split
(tool / skill / RAG / memory) and why they are not under .claude/.
RAG — Knowledge Engine
Architecture
LLMs hallucinate Maya API details constantly — wrong flag names (width= instead of w=), nonexistent commands (cmds.usdExport instead of cmds.mayaUSDExport), incorrect return types. maya-mcp includes a hybrid RAG engine (ChromaDB semantic + BM25 lexical, fused via Reciprocal Rank Fusion) with 5 curated documentation corpora covering maya.cmds, PyMEL, Arnold/mtoa, Maya-USD, and a comprehensive anti-patterns database. The LLM calls search_maya_docs before writing any unfamiliar code, getting verified syntax with relevance scores.
HyDE Query Expansion
Short queries like "set keyframe tangent" don't match code-heavy documentation well. maya-mcp uses Hypothetical Document Embedding (HyDE) — it detects which Maya API domain the query targets (cmds, PyMEL, Arnold, USD, MEL) and wraps the query in a domain-specific code template before embedding. This bridges the gap between natural-language questions and code documentation.
Dangerous Pattern Detection
Before any code reaches Maya, the safety module scans for 14+ dangerous patterns: bulk deletes without filters, undo system tampering, filesystem operations on scene files, plugin deregistration with active nodes, namespace deletions, referenced geometry modification, and more. Each pattern includes an explanation of WHY it is dangerous and a SAFE alternative.
Self-Learning
When the RAG returns low-relevance results (< 60%) but the operation succeeds, the LLM can call learn_pattern to save the working pattern for future sessions. Model trust gates ensure only Opus/Fable can write directly to docs — other models stage candidates for human review. Knowledge grows over time without manual curation.
Token Tracking
Every tool call tracks tokens in/out. The session_stats tool reports how much context was saved by RAG vs loading full documentation, making the efficiency gains measurable and visible.
Project Structure
maya-mcp/
├── src/
│ └── maya_mcp/
│ ├── __init__.py
│ ├── __main__.py
│ ├── server.py # FastMCP server — 17 MCP tools
│ ├── maya_bridge.py # TCP bridge → Maya Command Port :8100
│ ├── safety.py # Dangerous pattern detection (14+ patterns)
│ ├── config.example.json
│ ├── rag/
│ │ ├── config.py # Embedding model, search params, token tracking
│ │ ├── build_index.py # Chunk docs → ChromaDB + BM25 corpus
│ │ ├── search.py # Hybrid search: BM25 + semantic + HyDE + RRF
│ │ ├── index/ # ChromaDB persistent index (auto-generated)
│ │ └── corpus.json # BM25 corpus (auto-generated)
│ └── docs/
│ ├── CMDS_API.md # maya.cmds reference (commands, flags, patterns)
│ ├── PYMEL_API.md # PyMEL object-oriented API reference
│ ├── ARNOLD_API.md # Arnold/mtoa shaders, AOVs, render settings
│ ├── USD_API.md # Maya-USD import/export, proxy shapes, pxr API
│ └── ANTI_PATTERNS.md # Common LLM hallucinations + wrong flag names
├── docs/
│ └── skills/ # Claude Code skills (symlinked into ~/.claude/skills/)
│ ├── maya-headless-batch/ # mayapy/kick out-of-process work + runner template
│ ├── maya-scene-assembly/ # references, namespaces, version swaps
│ └── maya-anim-transfer/ # HumanIK retarget, cycles, reach semantics
│
├── console/ # Qt console — Maya panel + legacy standalone
│ ├── qt_compat.py # PySide2 (Maya 2023-2024) / PySide6 (2025+) shim
│ ├── maya_panel.py # Dockable workspaceControl panel for Maya
│ ├── chat_widget.py # Reusable MCPChatWidget (shared by panel & standalone)
│ ├── claude_worker.py # QThread worker — Claude CLI subprocess bridge
│ ├── server_panel.py # MCP server discovery, health checks, ServerStatusBar
│ ├── userSetup_snippet.py # Paste into Maya's userSetup.py for auto-setup
│ ├── app.py # Legacy standalone entry point (use fpt-mcp console)
│ ├── chat_window.py # Legacy standalone chat window
│ └── build_app_bundle.py # Legacy macOS .app bundle generator
│
├── tests/
├── pyproject.toml # Build config, entry point: python -m maya_mcp.server
├── reference/ # Pipeline I/O (git-ignored)
├── CLAUDE.md # Project documentation for Claude
├── WORKFLOW_GUIDE.md # Workflow guide
├── .env.example # Configuration template
└── README.mdRequirements
macOS
Autodesk Maya 2023 or later
Python 3.13 or higher (ships with Maya 2027)
Node.js v22 or higher (required by Claude Code)
Claude Code 2.x
A Claude account — Pro, Max, or API key
Optional
Ollama >= 0.17.6 — for local / free inference instead of Anthropic cloud
macOS:
brew install ollama && brew services start ollamaLinux: https://ollama.com/download/linux (systemd)
Verify:
ollama --versionCreate the
qwen3.5-mcpmodel (required for Ollama backends):ollama pull qwen3.5:9b cat > /tmp/Modelfile.qwen35mcp <<'EOF' FROM qwen3.5:9b PARAMETER num_ctx 16384 PARAMETER temperature 0.7 PARAMETER top_p 0.8 PARAMETER top_k 20 EOF ollama create qwen3.5-mcp -f /tmp/Modelfile.qwen35mcpSee MODEL_STRATEGY.md for the full rationale (num_ctx bump,
think: falserequirement, KEEP_ALIVE tuning, KV-cache dtype)
Vision3D server for AI-powered 3D generation
Installation
Automatic Installation
git clone https://github.com/abrahamADSK/maya-mcp.git
cd maya-mcp
chmod +x install.sh
./install.shThe installer creates a virtual environment, installs dependencies, builds the RAG index, and registers the MCP server with Claude Code.
1. Clone and configure
git clone https://github.com/abrahamADSK/maya-mcp.git
cd maya-mcp
cp .env.example .env
# Optional: set GPU_API_URL as a *suggested default* for Vision3D.
# It is never auto-selected — Claude will surface it when asking you
# which Vision3D URL to use, and you have to confirm it explicitly.
# Example: GPU_API_URL=http://<your-gpu-host>:80002. Install dependencies
python3 -m venv .venv
source .venv/bin/activate
pip install -e .
# RAG dependencies (optional but recommended)
pip install chromadb sentence-transformers rank-bm253. Build the RAG index
python -m maya_mcp.rag.build_indexFirst run downloads the embedding model (~570 MB, cached afterwards). The index is stored in src/maya_mcp/rag/index/ and can be committed to git.
4. Set up Maya Command Port — automatic
install.sh does this for you. Step 7 of the installer detects every Maya version installed on the host, locates each version's user scripts dir, and writes an idempotent guarded block into userSetup.py that:
Adds the maya-mcp repo root to
sys.pathOpens the Command Port on
MAYA_PORT(from.env, default8100) bound tolocalhostusingsourceType='mel'with thename=kwarg form (the localhost bind keeps the port reachable only from this host — an all-interfaces bind would expose an unauthenticated arbitrary-code-execution port to the LAN; Maya 2027 also silently ignores the positional form whensourceTypeis specified)Registers the MCP Pipeline menu via
executeDeferred
The block is bounded by sentinel markers and reruns of install.sh are safe — the installer replaces the whole region when the markers are found.
Run ./install.sh --doctor after install to verify userSetup.py was written for every detected version (plus 4 other install-completeness checks).
Port 8100 default rationale: maya-mcp historically used port 7001, the Maya commandPort convention. On hosts with Autodesk Flame installed, port 7001 is already held by Flame's S+W Service Discovery and S+W Probe Server, and connections silently succeed against Flame instead of Maya — producing empty responses that the bridge (prior to v1.4.2) misinterpreted as successful no-ops. The default was moved to 8100 to coexist with Flame. Override via
MAYA_PORTin.envif your environment still uses 7001.
The MCP Pipeline Console panel installs itself automatically. The first time Claude connects to Maya (via maya_ping or maya_launch), the server injects the panel menu and UI through the Command Port. The panel docks next to the Attribute Editor and persists across sessions.
Add to your Maya userSetup.py:
Windows:
%USERPROFILE%/Documents/maya/<version>/scripts/userSetup.pymacOS:
~/Library/Preferences/Autodesk/maya/<version>/scripts/userSetup.pyLinux:
~/maya/<version>/scripts/userSetup.py
# --- MCP Pipeline Console auto-setup ---
import sys as _mcp_sys
_mcp_root = r"/path/to/maya-mcp" # replace with your clone path
if _mcp_root not in _mcp_sys.path:
_mcp_sys.path.insert(0, _mcp_root)
import maya.utils as _mcp_utils
def _mcp_open_command_port():
try:
import maya.cmds as _mc
# Bind to localhost: an all-interfaces (":8100") bind exposes an
# unauthenticated arbitrary-code-execution port to the whole LAN.
if not _mc.commandPort("localhost:8100", query=True):
_mc.commandPort(name="localhost:8100", sourceType="mel")
except Exception:
pass
def _mcp_menu_startup():
try:
from console.maya_panel import install_menu
import maya.cmds as _mc
if not _mc.menu("mcpPipelineMenu", exists=True):
install_menu()
except Exception:
pass
_mcp_utils.executeDeferred(_mcp_open_command_port)
_mcp_utils.executeDeferred(_mcp_menu_startup)
# --- end MCP Pipeline Console ---5. Configure Claude Code
claude mcp add maya-mcp -s user -- /path/to/maya-mcp/.venv/bin/python -m maya_mcp.serverOr for Claude Desktop, add to ~/Library/Application Support/Claude/claude_desktop_config.json:
{
"mcpServers": {
"maya-mcp": {
"command": "/path/to/maya-mcp/.venv/bin/python",
"args": ["-m", "maya_mcp.server"],
"cwd": "/path/to/maya-mcp",
"env": {
"GPU_API_URL": "http://your-gpu-host:8000",
"GPU_API_KEY": "your-api-key-here"
}
}
}
}6. Vision3D addon (optional — for AI 3D generation)
maya-mcp can optionally integrate with Vision3D for image-to-3D and text-to-3D generation. This is not required for core Maya functionality.
Vision3D URL is never stored. maya-mcp does not hold any Vision3D endpoint in config files, environment presets, or hardcoded defaults. On the first Vision3D call of each MCP session:
The dispatch returns
vision3d_url_required.Claude asks you in the chat which Vision3D URL to use.
You type the URL (e.g. a local Mac MPS instance or a remote CUDA host).
Claude calls
maya_vision3d(action="select_server", params={"url": "<the-url>"}).The URL is cached in the MCP process memory until restart and used for every subsequent call of the session.
You can switch servers mid-session by calling select_server again with a different URL. No restart required.
Suggested default via GPU_API_URL — if the environment variable GPU_API_URL is set, Claude surfaces it to you as a suggested default when asking for the URL. You still have to confirm or override it explicitly; it is never auto-selected. This is the only escape hatch for pre-selector installs. GPU_API_KEY is only needed if your Vision3D server has an API key configured.
Usage
Once installed, maya-mcp is available through Claude Code or any MCP-compatible client. Open Maya, ensure the Command Port is running, and start a conversation:
You: "Create a 2x2 grid of spheres with 0.5 unit spacing"
Claude → maya_create_primitive (sphere) × 4 → maya_transform (position each) → ResultYou: "Generate a 3D model from this reference image and import it"
Claude → maya_vision3d(action='generate_image', ...) → maya_vision3d(action='poll', ...) → maya_vision3d(action='download', ...) → maya_import_file → ResultAll operations go through the safety scanner before reaching Maya. Dangerous patterns are blocked with an explanation and a safe alternative.
Configuration Reference
Variable | Description | Default |
| Maya host |
|
| Maya Command Port |
|
| Optional suggested default for the Vision3D URL prompt. Never auto-selected — Claude asks the user to confirm or override at the first Vision3D call of each session. | — |
| Vision3D API key | — |
| Verify TLS certificates for |
|
| Shape generation timeout (seconds) |
|
| Texture generation timeout (seconds) |
|
| Opt-in durable audit log of tool executions. Set to | off |
config.json (not env vars) also accepts, besides backend/model/Ollama settings:
Key | Description | Default |
| Colour-management view pinned for review/preview captures ( |
|
| Static AST validation of |
|
| Models allowed to write learned patterns to the RAG corpus; others stage candidates for review. |
|
Audit Log (opt-in)
A durable, append-only record of what the model executed in Maya, and what happened — for accountability and forensics, separate from the logs/timings.jsonl efficiency telemetry.
Off by default. It only writes when
MAYA_AUDIT_LOGis set to a truthy value (1/true/yes/on). When unset there is zero perf, disk, or privacy impact and no behaviour change.What it records. One JSON line per call to
src/maya_mcp/logs/audit.jsonl:ts,tool,action, sanitisedparams,status(ok/error/safety_blocked/ast_rejected), plusmodel/backend. It coversexecute_python, the dedicated mutation tools, the mutatingmaya_sessionactions, and blocked attempts (safety scan / AST dry-run rejections). Read-only actions (ping,list_scene,scene_snapshot) are excluded.Size & privacy. For
execute_pythonthe code is stored truncated to ~2000 chars plus a SHA-256 of the full code and its length; Maya result payloads are never stored. The file rotates at 5 MB toaudit.jsonl.1(one rollover) and lives under the git-ignoredlogs/dir.Write-only. There is no MCP tool to read it (the tool count is unchanged). Inspect it with
jq/grep, e.g.jq 'select(.status=="safety_blocked")' src/maya_mcp/logs/audit.jsonl.
Cross-MCP Pipeline
When both maya-mcp and fpt-mcp are configured, Claude can orchestrate end-to-end VFX workflows: query ShotGrid for an asset → download reference image → generate 3D via Vision3D → import into Maya → register the publish back in ShotGrid. All from one conversation.
All three MCP servers (maya-mcp, fpt-mcp, flame-mcp) share the same architecture: hybrid RAG, HyDE, safety layer, self-learning, token tracking, and model trust gates.
Troubleshooting
Maya Command Port not responding — Verify in Maya's Script Editor: cmds.commandPort('localhost:8100', query=True). If False, run the open_command_port() snippet.
RAG search returns "index not found" — Run python -m maya_mcp.rag.build_index to build the index.
Shape inference fails immediately — Model weights may be incomplete. Check that hunyuan3d-dit-v2-0-turbo/model.fp16.safetensors (~4.6 GB) exists on the GPU server.
GPU API connection refused — Verify Vision3D is running: curl $GPU_API_URL/api/health.
Ecosystem
maya-mcp is part of a four-component VFX pipeline. Each component has a defined role:
Repo | Role |
Controls Autodesk Flame for compositing, conform, and finishing | |
Controls Autodesk Maya for 3D modeling, animation, and rendering | |
Connects to Autodesk Flow Production Tracking (ShotGrid) for production tracking, asset management, and publishes | |
GPU inference server for AI-powered 3D generation — the remote backend for maya-mcp's image-to-3D and text-to-3D tools |
maya-mcp sits at the 3D creation stage of the pipeline. It consumes vision3d via HTTP — submitting image-to-3D or text-to-3D jobs and importing the resulting .glb files into Maya. It works alongside fpt-mcp for end-to-end workflows: query ShotGrid for an asset, generate or load reference, build the 3D asset in Maya, and register the publish back in ShotGrid. flame-mcp typically operates downstream, receiving rendered outputs from Maya for finishing.
License
MIT License — see LICENSE for details.
Available Tools
17 toolslearn_patternA
Save a validated working pattern to the RAG knowledge base.
Call this after a successful operation when search_maya_docs returned low relevance (< 60%), indicating the pattern was not well-documented. The pattern will be available in future sessions.
Model trust gates: only Opus/Fable can write directly. Other models stage candidates for review.
| Name | Required | Description | Default |
|---|---|---|---|
| params | Yes |
Output Schema
| Name | Required | Description |
|---|---|---|
| result | Yes |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries full burden. It discloses model trust gates (only Opus/Fable write directly, others stage) and that patterns are available in future sessions. However, it does not mention any destructive effects or authentication requirements.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
Three sentences, front-loaded with purpose, then usage guidelines, then trust gates. No wasted words; each sentence adds essential information.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool saves to a knowledge base and an output schema exists (though not shown in input), the description covers purpose, usage, and trust model. It could mention what happens after staging or if patterns can be overwritten, but overall sufficient for an AI agent.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The input schema already provides clear descriptions for each parameter (api, code, description), so the tool description does not need to add parameter details. The description adds contextual usage info but no new parameter semantics.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool saves a validated working pattern to the RAG knowledge base. It uses specific verbs ('Save', 'call') and identifies the resource, distinguishing it from sibling tools like search_maya_docs or Maya operation tools.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
Provides explicit when to use: after successful operation when search_maya_docs returned low relevance (< 60%). Also specifies alternatives (search_maya_docs) and trust gates for different model tiers, giving clear context for invocation.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
maya_assign_materialA
Create a material (lambert, blinn, phong, aiStandardSurface) with RGB color and assign it to an object.
| Name | Required | Description | Default |
|---|---|---|---|
| params | Yes |
Output Schema
| Name | Required | Description |
|---|---|---|
| result | Yes |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The description discloses the primary actions (create material, assign to object) but omits behavioral details such as whether existing materials are overwritten, if new nodes are always created, or any side effects. No annotations are present to supplement.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single, front-loaded sentence with no wasted words, effectively conveying the tool's core function.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the schema's rich parameter descriptions and the presence of an output schema, the description covers the essential purpose and actions. However, it could briefly mention behavior for name generation or handling duplicates.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The input schema already provides detailed descriptions for all parameters (e.g., color range, material type list). The description adds minimal extra meaning beyond restating the available types and color attribute.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool creates a material (listing four specific types) with RGB color and assigns it to an object, distinguishing it from sibling tools like maya_create_light or maya_create_primitive.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
No explicit when-to-use or when-not-to-use guidance is provided. The description implies usage for material creation and assignment but lacks differentiation or prerequisites.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
maya_create_cameraC
Create a camera in Maya with configurable position, look-at point, and focal length.
| Name | Required | Description | Default |
|---|---|---|---|
| params | Yes |
Output Schema
| Name | Required | Description |
|---|---|---|
| result | Yes |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full burden. It only states 'create a camera', which implies a mutating operation, but does not disclose side effects (e.g., new node added to scene, selection changes, or what happens to existing cameras). For a creation tool, this is insufficient.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
A single, well-structured sentence that is front-loaded with the action and key configurable attributes. No extraneous information, earning its place.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool has an output schema, the description need not explain return values. It adequately conveys the basic operation but lacks completeness in terms of behavioral context and parameter details. It is minimally adequate.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The description mentions three of four parameters (position, look-at, focal length) but adds no detailed meaning beyond the schema's own descriptions. The name parameter is omitted. With schema description coverage reported as 0%, the description does not compensate by providing additional context.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the action 'create a camera' and specifies configurable attributes (position, look-at, focal length). This distinguishes it from sibling tools like maya_create_light or maya_create_primitive. However, it could explicitly state that it creates a camera node in the Maya scene.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
No guidance is provided on when to use this tool versus alternatives, such as maya_import_file or maya_create_primitive. There is no mention of prerequisites like an open Maya scene or any context about when this tool is appropriate.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
maya_create_lightB
Create a light in Maya (directional, point, spot, area, ambient) with configurable intensity and color.
| Name | Required | Description | Default |
|---|---|---|---|
| params | Yes |
Output Schema
| Name | Required | Description |
|---|---|---|
| result | Yes |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations available, the description carries full burden for behavioral disclosure. It only states 'create' without specifying side effects, required permissions, or whether the operation is reversible. This is insufficient for a mutation tool.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single efficient sentence that front-loads the core purpose. However, it could be slightly more structured by listing the configurable attributes more explicitly.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
The tool has an output schema (not shown) which may document return values, so the description need not explain them. However, it omits mention of position and name parameters, which are configurable. Overall adequate but not complete.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 0% (the tool description does not detail any parameter). Although the schema includes descriptions for each parameter, the tool description only generically mentions 'intensity and color' without adding meaning. It misses position and name, and does not compensate for the low coverage.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the action (create), the resource (a light in Maya), and specifies the supported light types (directional, point, spot, area, ambient). This distinguishes it from sibling tools like maya_create_camera or maya_create_primitive.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
No guidance is provided on when to use this tool versus alternatives, nor are there any exclusions or prerequisites mentioned. The agent lacks context to choose correctly among creation tools.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
maya_create_primitiveB
Create a 3D primitive in Maya (cube, sphere, cylinder, cone, plane, torus) with optional position, scale, and rotation.
| Name | Required | Description | Default |
|---|---|---|---|
| params | Yes |
Output Schema
| Name | Required | Description |
|---|---|---|
| result | Yes |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Without annotations, description carries full burden but only states basic action. Does not disclose side effects (e.g., naming conflicts, undo behavior), or behavior when position/scale/rotation are omitted.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
Single sentence with verb and object front-loaded. Concise, but could include a brief usage note (e.g., naming defaults).
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Output schema exists (not shown), so return value explanation unnecessary. Lacks guidance on integration with other tools or error handling, but sufficient for basic use.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Input schema has descriptions for each parameter (0% coverage context likely refers to top-level, not nested). Description adds no extra meaning beyond summarizing optional parameters. Baseline 3 as schema already provides meaning.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
Description clearly states verb 'Create', resource '3D primitive', and lists all supported types (cube, sphere, etc.). This distinguishes it from sibling tools like maya_create_camera and maya_create_light.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
No guidance on when to use this tool versus alternatives (e.g., maya_mesh_operation for modifications). No mention of prerequisites or context.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
maya_import_fileA
Import 3D files into Maya: OBJ, FBX, GLB/GLTF, Alembic ABC, Maya MA/MB, BVH mocap. With namespace, parent group, and scale options.
GLB/GLTF: uses Maya's native glTF scene parser (type='glTF Import');
if the parser is not registered or import fails, falls back to the
Vision3D sibling pattern — mesh_uv.obj + texture_baked.png next
to the GLB — building an aiStandardSurface with the texture in
baseColor and assigning it to the imported meshes.
BVH: Maya has no native BVH import, so .bvh motion-capture files are
parsed and rebuilt by the pure-Python maya_mcp.bvh_import module
(hierarchy → joints, motion → keyframes, with the per-joint
BVH→Maya rotate-order mapping handled internally). namespace and
scale_factor are forwarded to the builder; the skeleton lands under a
<namespace>:bvh_grp group. The result feeds a HumanIK retarget onto a
rigged character (mocap → generic animation library).
| Name | Required | Description | Default |
|---|---|---|---|
| params | Yes |
Output Schema
| Name | Required | Description |
|---|---|---|
| result | Yes |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries full burden. It details fallback behavior for GLB/GLTF, special handling for BVH (pure-Python parser, HumanIK retarget), and explains namespace/scale_factor forwarding. It doesn't cover error conditions or undo behavior, but it provides substantial behavioral context.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is front-loaded with the main purpose and options, then dives into technical details for specific formats. It is relatively concise given the complexity, though some redundancy exists (e.g., repeated mention of namespace/scale_factor in BVH section). Structure is clear.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's complexity (multiple file types with special import logic), the description covers key behaviors. It mentions output implicitly (e.g., BVH leads to HumanIK retarget) but does not discuss return values; however, an output schema exists. It could mention error handling or prerequisites, but overall it is sufficient.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The description mentions namespace, parent group, and scale factor, adding some context (e.g., group_under created if not exists, BVH skeleton under bvh_grp). However, it does not thoroughly describe each parameter beyond what the input schema provides. The schema itself includes descriptions, so no major gaps.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states 'Import 3D files into Maya' and lists supported formats (OBJ, FBX, GLB/GLTF, Alembic ABC, Maya MA/MB, BVH mocap). This distinctively identifies the tool's action and resource, setting it apart from sibling tools like maya_create_primitive or maya_assign_material.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description implies when to use the tool (to import external 3D files) but does not explicitly state when not to use it or compare it to alternatives. It provides context for specific formats but lacks general usage guidance.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
maya_mesh_operationC
Execute mesh operations: extrude, bevel, boolean (union/difference/intersection), combine, separate, smooth.
| Name | Required | Description | Default |
|---|---|---|---|
| params | Yes |
Output Schema
| Name | Required | Description |
|---|---|---|
| result | Yes |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations provided, so description must disclose behavioral traits. It does not mention whether operations modify the original object, create new ones, require selection, or have undo capabilities. For a mutating tool with multiple operations, this omission is critical.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
Single sentence with no filler. Front-loaded with 'Execute mesh operations' and lists operations efficiently. Could include more context without sacrificing conciseness.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a tool with multiple operation types (some requiring multiple objects), the description lacks behavioral context such as side effects, required object states, or parameter dependencies. Despite an output schema existing, the minimal description is insufficient for complex use cases.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The input schema provides detailed descriptions for each parameter (e.g., faces, offset, divisions). The description adds a high-level list of operations but does not explain parameter relationships or usage beyond the schema. Schema coverage is high, so baseline 3 is appropriate.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool executes mesh operations and lists specific types (extrude, bevel, boolean, etc.). It distinguishes from sibling tools like maya_create_primitive (creation) and maya_transform (transformations), but does not explicitly name the resource (e.g., 'on a mesh object').
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
No guidance on when to use this tool versus alternatives. Does not specify prerequisites (e.g., object must exist) or provide when-not-to-use scenarios. Sibling tools like maya_create_primitive are for creation, but no explicit comparison.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
maya_referenceA
Reference a file into the Maya scene and manage the reference lifecycle: create, list, replace (version swap), load, unload.
A reference keeps a live link to the source file; maya_import_file
copies content in and breaks that link. Production scenes are assembled
from references, so prefer this tool whenever the content has its own
publish and may be re-versioned.
replace is the version-swap path: it repoints an existing reference
node at a new file without disturbing the namespace or anything built on
top of it. list returns every reference node with its file, namespace
and loaded state — the reference_node the other operations require.
unload keeps the link and drops the content from memory; it is the
reversible counterpart of load. Removing a reference outright is NOT
offered here: it is destructive and the safety module requires explicit
user confirmation for it.
| Name | Required | Description | Default |
|---|---|---|---|
| params | Yes |
Output Schema
| Name | Required | Description |
|---|---|---|
| result | Yes |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations at all, the description carries the full burden and does it well: it discloses that a reference keeps a live link, that replace repoints a node without disturbing its namespace or downstream work, that unload is the reversible counterpart of load, and that destructive removal is excluded for safety reasons.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
Four short paragraphs, each front-loaded with its point: the lifecycle summary, the import-file contrast, the version-swap behavior, and the load/unload/removal boundary. No sentence is filler.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a multi-operation tool with an output schema already covering return values and no annotations to lean on, the description covers the operation set, the safety boundary, and the sibling relationship. Nothing an agent needs to invoke it correctly is missing.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Top-level schema coverage is 0% and the description compensates by tying parameters to operations, e.g. reference_node is 'the reference_node the other operations require' and is obtained from operation='list', and file_path serves both create and replace. It does not state required-vs-optional per operation or the namespace default, which the nested schema does supply.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
States the verb and resource ('Reference a file into the Maya scene') and enumerates the full lifecycle it manages (create, list, replace, load, unload). It explicitly contrasts itself with the sibling maya_import_file ('copies content in and breaks that link'), so an agent can pick correctly without opening either schema.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
Gives an explicit when-to-use rule ('prefer this tool whenever the content has its own publish and may be re-versioned') plus the when-not case via maya_import_file, and states that outright removal is deliberately not offered here and requires explicit user confirmation elsewhere.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
maya_sessionA
Manage Maya session, query scene state, and run utility commands.
Available actions:
• ping — Check connection to Maya, return version/scene/renderer. No params needed. • launch — Open Maya and wait for Command Port to respond. No params needed. • new_scene — Create a new empty scene. Refuses if the current scene has unsaved changes; pass {"confirm": true} to discard them. • save_scene — Save the current scene. No params needed. • list_scene — List objects in the scene. Optional params: {"object_type": "mesh", "name_filter": "sphere"} • scene_snapshot — Full scene state: file, modified flag, frame range, object counts by type, renderer, plugins, resolution. No params needed. • delete — Delete objects by name (wildcards supported). Required params: {"object_name": "sphere"} • execute_python — Run arbitrary Python in Maya. Assign result to 'result' variable. Required params: {"code": "import maya.cmds as cmds; ..."} Optional: {"timeout": 60} — seconds to wait for Maya (default 10, max 600); use for long operations, progress heartbeats stream every 10s while waiting. • shelf_button — Create a shelf button with Python code. Required params: {"label": "MyBtn", "command": "print('hello')"} Optional: {"tooltip": "...", "shelf_name": "Custom", "icon_label": "MCP"} • operation_history — Read recent durable-audit records (read-only; needs MAYA_AUDIT_LOG=1). Optional params: {"limit": 50, "tool": "maya_transform", "action": "execute_python", "status": "error"} • publish — Drive the native Toolkit publisher (tk-multi-publish2) inside an engine'd Maya (launched via 'tank'). params: {"mode": "preview"|"publish", "include": ["rig"], "exclude": ["render"], "comment": "...", "timeout": 600}. 'preview' returns the collected publish tree; 'publish' activates matching tasks then validate→publish→finalize. Dependencies are captured automatically by the publish plugins. • review_turntable — Deterministic Viewport-2.0 turntable playblast → .mov (RUNS IN MAYA, long op). Frames the model, orbits 360° over [start,end] at fps, 16:9 / square pixels / overscan, offScreen (never Arnold). Required params: {"out_path": "/path.mov"} (resolve via fpt tk_resolve_path template 'movie_asset_publish' with name= so the file is {Asset}{Task}v###.mov, e.g. DJ_Model_v001.mov — NOT 'turntable'). Optional: {"start":1,"end":100,"fps":25,"width":1920,"height":1080,"objects":[...],"focal":50,"timeout":600}. Returns the .mov plus the engine asset/task and a Version code {Asset}{Task} so the review Version is named after the task it was generated in. • render_still — Single-frame Arnold ray-traced still → a PNG at the exact out_path (long op). This is what "a still / render a still" means — a real Arnold render, NOT the VP2.0 grab of maya_viewport_capture (use that for a fast screenshot). Maya only EXPORTS the scene to a .ass; kick renders it out of process, so the review view transform actually applies (a Render View dump writes scene-linear and ignores colour management), no Render View window is opened, and the render can never hang Maya's main thread. Required params: {"out_path": "/review/….png"} (resolve via fpt tk_resolve_path so it lands in the review area with the pipeline name). Optional: {"camera":"persp","frame":42,"width":1920,"height":1080,"aa_samples":3,"view_transform":"…","timeout":600}. Returns JSON {rendered, size_kb, camera, frame, resolution, asset, task, version_code} or {error}. For a still "for review" the version_code ({Asset}{Task}) is what names the ShotGrid review Version — rendering alone does not put it in review; create the Version (fpt sg_create type=Version) + sg_upload the PNG afterwards.
| Name | Required | Description | Default |
|---|---|---|---|
| params | Yes |
Output Schema
| Name | Required | Description |
|---|---|---|
| result | Yes |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations exist, so the description carries the full burden and does so: it discloses long-running semantics, default and max timeouts (default 10, max 600), progress heartbeats every 10s, the out-of-process render design that prevents main-thread hangs, the fact that rendering alone does not create a review Version, and the write/destructive nature of new_scene (discards unsaved work only with confirm:true) and delete.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The preamble is front-loaded and each action is a single scannable bullet with params inlined, which is the right structure for a 13-way dispatcher. It is long, and render_still in particular carries several explanatory clauses ('the review view transform actually applies…'), but almost all of the length is functional rather than padding.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a 13-action dispatch tool with a 0%-covered schema and an output schema present, this is complete: action semantics, param shapes, timeouts, prerequisites, and side effects are all given, and it even sketches return payloads where they affect follow-up work. Nothing an agent needs to invoke an action correctly is missing.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 0% — params is an untyped free-form object whose only guidance is '(see tool description)' — so the description must define every parameter, and it does: required vs optional params per action, wildcard support for delete/list_scene name filters, and the {label, command} shape for shelf_button. This fully compensates for the schema gap.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
States a specific verb+resource ('Manage Maya session, query scene state, run utility commands') and then enumerates all 13 dispatchable actions with their concrete effects. It explicitly distinguishes itself from siblings, e.g. render_still notes it is 'NOT the VP2.0 grab of maya_viewport_capture', so an agent can route correctly without reading either schema.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
Every action carries when-to-use context: new_scene 'Refuses if the current scene has unsaved changes', operation_history 'needs MAYA_AUDIT_LOG=1', render_still points to maya_viewport_capture for fast screenshots, and review_turntable/render_still both mandate resolving out_path via the fpt tk_resolve_path template. It stops short of stating when the overall dispatch tool should be preferred over single-purpose siblings like maya_transform.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
maya_set_keyframeB
Create an animation keyframe on an object. Allows animating translate, rotate, scale, and visibility per frame.
| Name | Required | Description | Default |
|---|---|---|---|
| params | Yes |
Output Schema
| Name | Required | Description |
|---|---|---|
| result | Yes |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries full burden but only states the action. It omits behavior like whether existing keyframes are overwritten, animation curve effects, or prerequisites (e.g., object must exist).
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single, focused sentence. It is front-loaded and efficient, with no redundant words.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Adequate for a simple keyframe tool but incomplete: does not mention return value (output schema exists), error handling, or interpolation behavior. Could add context on attribute default or tangents.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 0% per context, but the schema's property descriptions exist. The tool description does not add meaning beyond listing parameters; it does not explain relationships or usage order.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description is specific: 'Create an animation keyframe on an object' and lists animatable properties (translate, rotate, scale, visibility), clearly distinguishing it from siblings like maya_transform.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
No explicit guidance on when to use this tool versus alternatives (e.g., maya_transform for non-keyframe transformations). The description provides no when-not or context-of-use.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
maya_transformB
Move, rotate, or scale an object in the Maya scene.
| Name | Required | Description | Default |
|---|---|---|---|
| params | Yes |
Output Schema
| Name | Required | Description |
|---|---|---|
| result | Yes |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations provided, so description should disclose behavioral traits. It does not mention whether transforms are absolute or relative (though 'relative' parameter exists), or any side effects like history changes. Only states the action types.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
Single sentence, no wasted words, but overly sparse. Could include more context without losing conciseness.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Despite output schema existing, the description fails to cover the tool's complexity (3 operations, 5 parameters). No mention of parameters or how to use them, making it incomplete for a transform tool.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema descriptions cover parameters fully (e.g., 'New scale [x, y, z]'), so baseline is 3. The tool description adds no additional meaning beyond what the schema provides.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
Description uses specific verbs (move, rotate, scale) and identifies the resource (object in Maya scene), clearly distinguishing from sibling tools like maya_create_primitive or maya_assign_material.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
No guidance on when to use this tool vs alternatives, nor any conditions for move vs rotate vs scale. No exclusions or prerequisites mentioned.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
maya_viewport_captureA
Capture the Maya viewport as PNG/JPG image and return it for visual analysis. Does not do Arnold render — it is an instant Viewport 2.0 grab (<1s); for a ray-traced still use maya_session(action='render_still'). Useful for visually verifying scene state, checking lighting, framing, and detecting issues.
NEVER captures the user's focused viewport: it playblasts a throw-away Viewport-2.0 window (its own modelPanel forced to rendererName='vp2Renderer'), so an Arnold IPR / render-override active on the user's panel can never be captured — which would saturate Maya's main thread and hang it (memory feedback_maya_gs_arnold_ipr_hang; same technique as review_turntable).
| Name | Required | Description | Default |
|---|---|---|---|
| params | Yes |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full behavioral burden and largely succeeds: it discloses the <1s latency, that it never touches the user's focused viewport, that it spins up a throw-away modelPanel forced to vp2Renderer, and the failure mode it avoids (Arnold IPR saturation hanging Maya's main thread). It omits return-shape and side-effect details (e.g. whether output_path is written or only returned), which keeps it short of a 5.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
Front-loaded with the core action and its alternative before any mechanism detail, and the NEVER clause is a deliberate safety disclosure rather than filler. The parenthetical about rendererName='vp2Renderer' and the memory-feedback ID are more verbose than an agent strictly needs, but they justify their length.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
No output schema and no annotations, so the description must stand alone, and it covers purpose, alternative, timing, safety behavior, and use cases well enough to call the tool correctly. What it leaves unstated is how the image is returned (inline vs path-only) and whether output_path is always written, which are minor against an otherwise thorough definition.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The description adds no meaning for any of the five underlying parameters (frame, width, height, camera, output_path); a reader would not learn from it that a camera or frame can be selected. Reported schema description coverage is 0%, so the description is expected to compensate and does not, though the nested ViewportCaptureInput properties do carry brief descriptions of their own.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
States a specific verb and resource ('Capture the Maya viewport as PNG/JPG image') and immediately scopes it against the nearest sibling, clarifying it is an instant Viewport 2.0 grab rather than an Arnold render. An agent can distinguish it from maya_session(action='render_still') without opening either schema.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
Explicitly names the alternative and the selecting condition ('for a ray-traced still use maya_session(action='render_still')'), and lists concrete use cases (verifying scene state, lighting, framing). The when-not is stated as strongly as the when.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
maya_vision3dA
AI-powered 3D asset generation via Vision3D server (requires GPU with Hunyuan3D-2).
Server selection is fully per-session and runtime-only: the first
action that needs a GPU call returns vision3d_url_required. The
LLM must ask the user for the Vision3D URL in the chat and then call
select_server with that URL. Nothing is persisted to disk — the
URL lives only in process memory until the MCP server restarts.
After selection, jobs are non-blocking: start → poll → download.
Available actions:
• select_server — Set the Vision3D server URL for the rest of the session. Required params: {"url": "http://..."}. Accepts any valid http/https URL; ask the user first. • health — Check if the selected Vision3D server is running and what GPU/models are available. No params. • generate_image — Start 3D generation from a reference image. Required params: {"image_path": "/path/to/image.png", "output_subdir": "my_asset"} Optional: {"preset": "medium", "model": "turbo", "octree_resolution": 384, "num_inference_steps": 20, "target_faces": 50000} • generate_text — Start 3D generation from a text prompt. Required params: {"text_prompt": "a medieval sword", "output_subdir": "sword"} Optional: {"preset": "medium", "model": "turbo", "octree_resolution": 384, "num_inference_steps": 20, "target_faces": 50000} • texture — Texture an existing mesh using a reference image. Required params: {"output_subdir": "my_asset"} Optional: {"mesh_filename": "mesh.glb", "image_filename": "input.png"} • poll — Check job progress (call repeatedly while running). Required params: {"job_id": "uuid-from-generate"} • download — Download completed job results. Required params: {"job_id": "uuid", "output_subdir": "my_asset"} Optional: {"files": ["textured.glb", "mesh.glb"]}
| Name | Required | Description | Default |
|---|---|---|---|
| params | Yes |
Output Schema
| Name | Required | Description |
|---|---|---|
| result | Yes |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Discloses key traits: GPU requirement, no persistence (URL only in memory), non-blocking jobs. Missing details on error handling, whether it modifies the Maya scene, or output cleanup, but still highly informative.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
Well-structured with bullet points for each action and a clear workflow. Slightly verbose (multiple paragraphs) but earns its length by covering all necessary details.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Covers the entire pipeline from server selection to download, including async behavior. No gaps in understanding how to use this complex tool.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Despite 0% schema coverage (schema only defines dispatch structure), the description fully documents each action's parameters with examples (e.g., 'Required params: {"image_path": ...}'). Compensates completely for lack of schema detail.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly identifies it as 'AI-powered 3D asset generation via Vision3D server' and lists all sub-actions (select_server, health, generate_image, etc.). Distinct from sibling Maya tools (e.g., maya_create_primitive) which focus on direct scene manipulation.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
Explicit workflow: first select_server (ask user for URL), then start generation, poll, download. States 'jobs are non-blocking: start → poll → download' and provides required/optional params for each action.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
maya_worldlabsA
Generate a World Labs (Marble) Gaussian-splat ENVIRONMENT from an image and load it into Maya for Arnold.
Pipeline — call the actions in order: generate → poll → download → convert → build. Credits are spent ONLY by generate with confirm=true. Call status on a work area to resume an interrupted run from disk without re-generating.
Actions:
• health — Check the WorldLabs API key + credit balance. No params. • generate — Start image→world generation. Required params: {"image": "/path.png" or "https://..."}. Optional: {"output_subdir": "world", "model": "marble-1.1"|"marble-1.1-plus", "display_name": ..., "text_prompt": ..., "confirm": true, "work_dir": "/work/worldlabs/"}. WITHOUT confirm=true it returns a cost-confirmation payload and spends NOTHING. Pass work_dir (the Toolkit work area, resolved via fpt-mcp tk_resolve_path) to write a resume sidecar so an interrupted run resumes without re-generating. • poll — Poll a generation (~5 min). Required params: {"operation_id": "..."}. • download — Download a finished world's assets to the work area. Required params: {"operation_id": "...", "dest_dir": "/work/worldlabs/"}. Optional: {"which": ["splats_full_res", "pano"]}. Updates the resume sidecar (world_id + downloaded paths). • convert — Convert the downloaded SPZ to PLY (Arnold-readable, via gsbox). Required params: {"spz_path": "/path.spz"}. Optional: {"ply_path": "/out.ply"}. • build — Load into Maya (RUNS IN MAYA): aiGaussianSplat + coloured point proxy + emission shader + eye-level centred camera, plus a fake-HDR panorama dome if given. Required params: {"ply_path": "/world.ply"}. Optional: {"pano_path": "/pano.png", "eye_height": 1.5, "proxy_step": 1, "relight": false, "draw_mode": 2, "focal": 15.0, "timeout": 300, "save_path": "/…/maya/scene.v001.ma"}. draw_mode: 2=Gaussian Splat (default, draws natively in VP2.0), 1=Point Cloud, 0=Bounding Box. focal: camera focal length in mm (default 15, wide for environments). save_path: when given (the Toolkit work-file path resolved via fpt-mcp tk_resolve_path on template maya_asset_work — Toolkit naming/versioning), the assembled scene is saved there so "open in Maya" lands the work file at the config-correct path with no manual Workfiles pick. • status — Report the resumable state of a work area (sidecar + on-disk .spz/.ply/.png). Required params: {"work_dir": "/work/worldlabs/"}. Returns where the pipeline left off (needs_generate / needs_download / needs_convert / ready_to_build).
| Name | Required | Description | Default |
|---|---|---|---|
| params | Yes |
Output Schema
| Name | Required | Description |
|---|---|---|
| result | Yes |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Without annotations, the description takes full burden and discloses key behaviors: credit spending only with confirm=true, resumability via sidecar, that build runs in Maya, and draw_mode options. It could be improved by mentioning whether operations are destructive or reversible, but overall it is transparent.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is comprehensive but verbose, containing several paragraphs and very detailed parameter lists. It is front-loaded with the purpose, but the length could be trimmed without losing essential information, making it less efficient for quick parsing.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a dispatch tool with 7 actions and no annotations, the description is mostly complete for inputs but lacks details on outputs per action (e.g., poll returns). The presence of an output schema (not shown) may mitigate this, but the description does not reference it, leaving a gap for agents.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The input schema is generic (only action and params as any), providing 0% coverage. The description fully compensates by listing all parameters for each action with types, examples, and optional flags, adding essential meaning beyond the schema.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool's purpose: generating a World Labs Gaussian-splat environment from an image and loading it into Maya for Arnold. It distinguishes the tool from siblings by its specific pipeline of actions, and the name itself signals the domain.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description provides a clear pipeline order (generate → poll → download → convert → build) and gives explicit guidance on credit spending and resuming interrupted runs via status. However, it does not compare directly to sibling tools or state when not to use it, though the specialized nature makes alternatives obvious.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
reset_session_statsA
Zero the session stats counters immediately.
Use at the start of a new Claude session (or a fresh debugging run) when the idle-based auto-reset has not fired — for example when two sessions happen back-to-back. Returns a confirmation line with the new reset timestamp.
| Name | Required | Description | Default |
|---|---|---|---|
No parameters | |||
Output Schema
| Name | Required | Description |
|---|---|---|
| result | Yes |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations provided, so description carries full burden. It discloses immediate zeroing, reset of counters, and return of confirmation timestamp. Missing explicit statement that it is destructive (clears data irreversibly), but 'Zero' sufficiently implies mutation.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
Three precise sentences front-loaded with the action. Every sentence earns its place: action, usage context, return value. No wasted words.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given zero parameters and output schema existence, description fully captures behavior: immediate reset, use case, and return value. Complements schema and context signals.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
No parameters; baseline 4 applies. Description adds no parameter info, but none is needed as the schema is empty and coverage is 100%.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
Description clearly states the action: 'Zero the session stats counters immediately.' It uses specific verb 'Zero' and resource 'session stats counters', distinguishing it from the sibling 'session_stats' which presumably reads stats.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
Explicitly states when to use: 'at the start of a new Claude session (or a fresh debugging run) when the idle-based auto-reset has not fired'. Provides a concrete example (back-to-back sessions) and contrasts with alternative behavior (auto-reset).
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
search_maya_docsA
Search Maya API documentation using hybrid RAG (semantic + BM25).
Call this BEFORE writing complex Maya commands, using unfamiliar flags, or when unsure about command names, return values, or syntax. Returns the most relevant documentation chunks with relevance scores.
Covers: maya.cmds, PyMEL, Arnold/mtoa, Maya-USD, and common anti-patterns. Uses HyDE query expansion + Reciprocal Rank Fusion for high precision.
| Name | Required | Description | Default |
|---|---|---|---|
| params | Yes |
Output Schema
| Name | Required | Description |
|---|---|---|
| result | Yes |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are present, so the description carries the full burden. It discloses the RAG technique, HyDE query expansion, and that results include relevance scores. It does not discuss side effects or rate limits, but such details are less critical for a search tool.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is concise (four sentences), front-loaded with the core purpose, and each sentence adds distinct value (what, when, what covers, how). No fluff or repetition.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the presence of an output schema and rich input schema, the description covers the tool's overall role, supported content, and advanced technique. Minor gaps (e.g., parameter details) are mitigated by the schema, so completeness is high for a search tool.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 0% because the tool description does not mention parameters. Although the input schema itself provides detailed parameter descriptions, the low coverage means the description must compensate; it fails to do so, leaving the agent without higher-level parameter semantics from the free text.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states 'Search Maya API documentation using hybrid RAG (semantic + BM25)' and lists covered domains (maya.cmds, PyMEL, etc.). It distinguishes from sibling tools that perform specific Maya actions by positioning itself as a preliminary research step.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
Explicit usage guidance is provided: 'Call this BEFORE writing complex Maya commands, using unfamiliar flags, or when unsure...' This helps the agent decide when to use it, though it does not explicitly state when not to use it or mention alternatives.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
session_statsA
Show session efficiency statistics: token usage, RAG savings, patterns learned.
Call at the end of multi-step tasks or when asked about efficiency. Shows how much context was saved by RAG vs loading full documentation.
| Name | Required | Description | Default |
|---|---|---|---|
No parameters | |||
Output Schema
| Name | Required | Description |
|---|---|---|
| result | Yes |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries full burden, describing output details like RAG savings compared to full documentation, implying a read-only statistics tool.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
Three concise sentences with front-loaded purpose, usage guidance, and output detail; no wasted words.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given zero parameters and presence of output schema, description fully covers when to use and what information is provided, including specific RAG comparison.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
No parameters, baseline 4. Description adds context about what statistics are displayed, compensating for lack of param info.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool shows session efficiency statistics (token usage, RAG savings, patterns learned), distinguishing it from siblings like reset_session_stats and learn_pattern.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
Explicitly says to call at the end of multi-step tasks or when asked about efficiency, providing clear usage context, though it doesn't specify when not to use.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Tool Schema Changelog
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
2 tool updates
v1.26.0- Added
maya_reference - Changed
maya_session1 field changed- changed
Input schema / $defs / SessionAction / enumPrevious value: -[ - "ping", - "launch", - "new_scene", - "save_scene", - "list_scene", - "scene_snapshot", - "delete", - "execute_python", - "shelf_button", - "operation_history", - "publish", - "review_turntable" -]New value: +[ + "ping", + "launch", + "new_scene", + "save_scene", + "list_scene", + "scene_snapshot", + "delete", + "execute_python", + "shelf_button", + "operation_history", + "publish", + "review_turntable", + "render_still" +]
16 tool updates
v1.23.0- First observed
learn_pattern - First observed
maya_assign_material - First observed
maya_create_camera - First observed
maya_create_light - First observed
maya_create_primitive - First observed
maya_import_file - First observed
maya_mesh_operation - First observed
maya_session - First observed
maya_set_keyframe - First observed
maya_transform - First observed
maya_viewport_capture - First observed
maya_vision3d - First observed
maya_worldlabs - First observed
reset_session_stats - First observed
search_maya_docs - First observed
session_stats
TDQS
Scored across 17 tools
Most tools target distinct operations, and the descriptions go out of their way to distinguish rendering paths (maya_viewport_capture vs maya_session render_still vs review_turntable) and import vs reference. However, maya_session is a god-tool bundling 13 actions (render, publish, turntable, delete, execute_python) that overlap conceptually with dedicated tools like maya_import_file and maya_viewport_capture, making boundaries hard to reason about.
The core tools use a predictable maya_verb_noun snake_case pattern (maya_create_primitive, maya_assign_material, maya_transform). A few deviate with a noun-verb or no-prefix form (search_maya_docs, learn_pattern, session_stats, reset_session_stats), but all remain snake_case and readable.
17 top-level tools is slightly above the comfortable range, but the real issue is that three of them (maya_session, maya_vision3d, maya_worldlabs) are multi-action mega-tools hiding ~27 additional actions, making the effective surface far larger than the count suggests.
Coverage of the DCC automation domain is broad: primitives, transforms, materials, lights, cameras, mesh ops, keyframes, import, references, rendering, publishing, docs search, and learning. Minor gaps exist (no standalone delete/update for objects beyond transform, no rigging/joint tools), but they are workable via maya_session(execute_python).
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