set_parameter_expression

Set one or more parameters on a node using five modes:

SERVERtdmcp — TouchDesigner MCP server SOURCE@dpantani/tdmcp

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/io-github-pantani-tdmcp/set-parameter-expression.md

WHAT IT DOES

What set_parameter_expression does on tdmcp — TouchDesigner MCP server

AI agents use set_parameter_expression to create or update resources in tdmcp — TouchDesigner MCP server, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your tdmcp — TouchDesigner MCP server environment.

RISK

Why set_parameter_expression is rated Medium

Modifies node parameters in TouchDesigner; reversible by resetting values.

From the tool's definition Set one or more parameters on a node

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs set_parameter_expression 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 set_parameter_expression, this is the rule to start with:

set_parameter_expression Rate-limited

set_parameter_expression 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": {
    "set_parameter_expression": {
      "limits": [
        {
          "counter": "set_parameter_expression_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 tdmcp — TouchDesigner MCP server, apply this rule, and every set_parameter_expression call is checked against it from then on.

FAQ

Questions about set_parameter_expression

What does the set_parameter_expression tool do? +

Set one or more parameters on a node using five modes:. It is categorised as a Write tool in the tdmcp — TouchDesigner MCP server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on set_parameter_expression? +

Register the tdmcp — TouchDesigner MCP server MCP server in PolicyLayer and add a rule for set_parameter_expression: 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 set_parameter_expression? +

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

Can I rate-limit set_parameter_expression? +

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

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

set_parameter_expression 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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