sp_to_svelte

THE RISK

High Risk

Why sp_to_svelte needs a policy

This tool performs a code transformation/conversion operation — taking HTML/Tailwind input and generating SvelteKit component code. This goes beyond a simple read or write; it executes a transformation pipeline that produces executable code artifacts. The blast radius is medium since misuse could generate malformed or insecure component code, but it does not directly delete data or move money.

From the tool's definition Convert HTML/Tailwind to SvelteKit components with Svelte 5 runes ($state) and optional component library mapping

Documented attack patterns abuse exactly the kind of access sp_to_svelte gives an agent:

POLICY

How to control sp_to_svelte

PolicyLayer is an MCP gateway — it sits between your AI agents and Stitch Pro, and nothing reaches the server without passing your rules. This is the rule we recommend for sp_to_svelte:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "sp_to_svelte": {
      "limits": [
        {
          "counter": "sp_to_svelte_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

sp_to_svelte stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

Create a free account and register Stitch Pro — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

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Go deeper

High-risk tools in Stitch Pro → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Agent sandbox → Bounding what an agent can execute and where the boundary should sit.
Least privilege for MCP → Granting agents the minimum tool surface the task needs.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about sp_to_svelte

What does the sp_to_svelte tool do? +

Convert HTML/Tailwind to SvelteKit components with Svelte 5 runes ($state) and optional component library mapping. It is categorised as a Execute tool in the Stitch Pro MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on sp_to_svelte? +

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

What risk level is sp_to_svelte? +

sp_to_svelte is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit sp_to_svelte? +

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

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

sp_to_svelte is provided by the Stitch Pro MCP server (luciferdono/stitch-pro-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Stitch Pro tool call.

Start from Stitch Pro, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →