Add a working Three.js script with proper XR8 pipeline setup for 8th Wall Desktop
AI agents use desktop_add_threejs_script to create or update resources in 8th Wall MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your 8th Wall MCP Server environment.
This tool creates or adds new code/script assets to an AR project, which is a reversible modification operation (scripts can be edited, replaced, or removed). It does not execute arbitrary code in the context of the host system (Execute), nor does it delete data (Destructive). The blast radius is limited to the project's script layer.
From the tool's definition Tool description states 'Add a working Three.js script' - the verb 'Add' indicates creation/modification of code artifacts in the AR project. The tool modifies the project state by injecting a script into the XR8 pipeline setup.
Documented attack patterns abuse exactly the kind of access desktop_add_threejs_script gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and 8th Wall MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for desktop_add_threejs_script:
{
"version": "1",
"default": "deny",
"tools": {
"desktop_add_threejs_script": {
"limits": [
{
"counter": "desktop_add_threejs_script_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}desktop_add_threejs_script stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
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Add a working Three.js script with proper XR8 pipeline setup for 8th Wall Desktop. It is categorised as a Write tool in the 8th Wall MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the 8th Wall MCP Server MCP server in PolicyLayer and add a rule for desktop_add_threejs_script: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches 8th Wall MCP Server. Nothing to install.
desktop_add_threejs_script is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the desktop_add_threejs_script rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for desktop_add_threejs_script. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
desktop_add_threejs_script is provided by the 8th Wall MCP Server MCP server (superdwayne/8thwallmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from 8th Wall MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
64 8th Wall MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.