create_from_template · Synthlab MCP: Risk & Policy

WHAT IT DOES

What create_from_template does on Synthlab

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

WHY IT NEEDS A POLICY

Why create_from_template needs a policy

This tool creates new Pd (Pure Data) patch files, which are reversible modifications to the user's music synthesis environment. While the patches are written to disk, they do not execute code by themselves and can be deleted or modified afterwards. This makes it a Write operation rather than Execute.

From the tool's definition Tool description states 'Generate a Pd patch from a parameterized template' — this creates new synthesizer patch files based on templates.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_from_template Rate-limited

create_from_template 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_from_template": {
      "limits": [
        {
          "counter": "create_from_template_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Synthlab, so you can run agents against it safely.

FAQ

Questions about create_from_template

What does the create_from_template tool do? +

Generate a Pd patch from a parameterized template. It is categorised as a Write tool in the Synthlab 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_from_template? +

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

What risk level is create_from_template? +

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

Can I rate-limit create_from_template? +

Yes. Add a rate_limit block to the create_from_template 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_from_template completely? +

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

create_from_template is provided by the Synthlab MCP server (j0kz/synthlab-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.