get_preview

Capture a TOP node

SERVERtdmcp — TouchDesigner MCP server SOURCE@dpantani/tdmcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-pantani-tdmcp/get-preview.md

WHAT IT DOES

What get_preview does on tdmcp — TouchDesigner MCP server

AI agents call get_preview to retrieve information from tdmcp — TouchDesigner MCP server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why get_preview is rated Low

The tool captures/retrieves a snapshot of a TOP (Texture Operator) node's output state. This is a read operation that queries the current visual state without creating, modifying, deleting, or executing external operations. The 'capture' action produces an image or data representation of existing state rather than changing it.

From the tool's definition Tool name 'get_preview' and description 'Capture a TOP node' indicate retrieval of visual data from TouchDesigner without modification or side effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs get_preview safely

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

get_preview Allowed

get_preview is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_preview": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect tdmcp — TouchDesigner MCP server, apply this rule, and every get_preview call is checked against it from then on.

FAQ

Questions about get_preview

What does the get_preview tool do? +

Capture a TOP node. It is categorised as a Read tool in the tdmcp — TouchDesigner MCP server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_preview? +

Register the tdmcp — TouchDesigner MCP server MCP server in PolicyLayer and add a rule for get_preview: 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 tdmcp — TouchDesigner MCP server. Nothing to install.

What risk level is get_preview? +

get_preview is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_preview? +

Yes. Add a rate_limit block to the get_preview 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 get_preview completely? +

Set action: deny in the PolicyLayer policy for get_preview. 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 get_preview? +

get_preview is provided by the tdmcp — TouchDesigner MCP server MCP server (@dpantani/tdmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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