Add a video plane with custom JavaScript for video texture
AI agents use desktop_add_video 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 modifies AR scene components (video plane with associated JavaScript) reversibly. It is Write rather than Execute because the custom JavaScript is constrained to video texture handling in a specific context, not arbitrary shell/system command execution.
From the tool's definition Tool description states: 'Add a video plane with custom JavaScript for video texture'. The action 'Add' indicates creation/modification of scene elements within the 3D AR experience.
Documented attack patterns abuse exactly the kind of access desktop_add_video 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_video:
{
"version": "1",
"default": "deny",
"tools": {
"desktop_add_video": {
"limits": [
{
"counter": "desktop_add_video_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}desktop_add_video 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 video plane with custom JavaScript for video texture. 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_video: 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_video 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_video 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_video. 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_video 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.