generate_preview

THE RISK

High Risk

Why generate_preview needs a policy

Generating a visual preview involves executing a rendering pipeline or spawning an external process to produce HTML/CSS output. It goes beyond a simple read/query as it actively produces/renders artifacts, placing it in the Execute category. Misuse risk is medium since it could render arbitrary content but has limited blast radius.

From the tool's definition "Generate visual preview" — triggers an external rendering/generation operation to produce output from Tailwind component definitions

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

POLICY

How to control generate_preview

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

policy.json

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

generate_preview 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 MCP Tailwind Gemini Server — 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

Related tools and policies

More MCP Tailwind Gemini Server tools

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All 10 MCP Tailwind Gemini Server tools →

Execute tools on other servers

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Go deeper

High-risk tools in MCP Tailwind Gemini Server → 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 generate_preview

What does the generate_preview tool do? +

Generate visual preview of Tailwind components. It is categorised as a Execute tool in the MCP Tailwind Gemini Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on generate_preview? +

Register the MCP Tailwind Gemini Server MCP server in PolicyLayer and add a rule for generate_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 MCP Tailwind Gemini Server. Nothing to install.

What risk level is generate_preview? +

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

Can I rate-limit generate_preview? +

Yes. Add a rate_limit block to the generate_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 generate_preview completely? +

Set action: deny in the PolicyLayer policy for generate_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 generate_preview? +

generate_preview is provided by the MCP Tailwind Gemini Server MCP server (tai-dt/mcp-tailwind-gemini). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every MCP Tailwind Gemini Server tool call.

Start from MCP Tailwind Gemini Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →