create_two_way_surface

SERVERAos SOURCE@hybridlabor-api/aos

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/hybridlabor-api-aos/create-two-way-surface.md

WHAT IT DOES

What create_two_way_surface does on Aos

AI agents use create_two_way_surface to create or update resources in Aos, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Aos environment.

RISK

Why create_two_way_surface is rated Medium

This tool creates a new control surface configuration within TouchDesigner, establishing bidirectional OSC/MIDI communication bindings. It creates/modifies network nodes and parameter mappings — a reversible write operation. It does not execute arbitrary code, delete data, or involve financial transactions.

From the tool's definition 'Build a bidirectional OSC or MIDI control surface that drives TouchDesigner params from a controller AND echoes outgoing changes back to it (motor faders, RGB pads)'

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs create_two_way_surface safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Aos, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For create_two_way_surface, this is the rule to start with:

create_two_way_surface Rate-limited

create_two_way_surface 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "create_two_way_surface": {
      "limits": [
        {
          "counter": "create_two_way_surface_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Aos, apply this rule, and every create_two_way_surface call is checked against it from then on.

FAQ

Questions about create_two_way_surface

What does the create_two_way_surface tool do? +

Build a bidirectional OSC or MIDI control surface that drives TouchDesigner params from a controller AND echoes outgoing changes back to it (motor faders, RGB pads), with an oscillation guard so the device. It is categorised as a Write tool in the Aos MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_two_way_surface? +

Register the Aos MCP server in PolicyLayer and add a rule for create_two_way_surface: 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 Aos. Nothing to install.

What risk level is create_two_way_surface? +

create_two_way_surface is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit create_two_way_surface? +

Yes. Add a rate_limit block to the create_two_way_surface 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.

How do I block create_two_way_surface completely? +

Set action: deny in the PolicyLayer policy for create_two_way_surface. 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.

What MCP server provides create_two_way_surface? +

create_two_way_surface is provided by the Aos MCP server (@hybridlabor-api/aos). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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