create_design_system · Stitch- MCP: Risk & Policy

WHAT IT DOES

What create_design_system does on Stitch-MCP

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

WHY IT NEEDS A POLICY

Why create_design_system needs a policy

The 'create_design_system' tool creates a new design system object, which is a Write operation (creates/modifies data reversibly). While the description is empty, the tool name and context of design system management on this MCP server strongly indicate data creation. Severity is medium because misuse would add unwanted design system configurations but would not irreversibly delete data or execute arbitrary code.

From the tool's definition Tool name 'create_design_system' indicates creation of a design system artifact. Sibling tools show this server manages design and project data (generate_screen_from_text, apply_design_system, edit_screens, create_project).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_design_system Rate-limited

create_design_system 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_design_system": {
      "limits": [
        {
          "counter": "create_design_system_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 Stitch-MCP, so you can run agents against it safely.

FAQ

Questions about create_design_system

What does the create_design_system tool do? +

create_design_system. It is categorised as a Write tool in the Stitch-MCP 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_design_system? +

Register the Stitch- MCP server in PolicyLayer and add a rule for create_design_system: 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 Stitch-MCP. Nothing to install.

What risk level is create_design_system? +

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

Can I rate-limit create_design_system? +

Yes. Add a rate_limit block to the create_design_system 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_design_system completely? +

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

create_design_system is provided by the Stitch- MCP server (samueljayasingh/stitchmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.