export_artifact · Web Gui MCP: Risk & Policy

WHAT IT DOES

What export_artifact does on Web Gui

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

WHY IT NEEDS A POLICY

Why export_artifact needs a policy

Export operations typically write or serialize data to external formats or destinations. Given the artifact storage context, this likely creates or outputs data reversibly (Write category). Severity is medium because exporting artifacts could potentially expose sensitive HTML/UI data depending on destination and access controls, but lacks clear destructive or financial impact.

From the tool's definition Tool name 'export_artifact' suggests exporting/writing data artifacts. Server description indicates artifacts are stored in memory. Exact function unclear due to empty description.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

export_artifact Rate-limited

export_artifact 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": {
    "export_artifact": {
      "limits": [
        {
          "counter": "export_artifact_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 Web Gui, so you can run agents against it safely.

FAQ

Questions about export_artifact

What does the export_artifact tool do? +

export_artifact. It is categorised as a Write tool in the Web Gui MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on export_artifact? +

Register the Web Gui MCP server in PolicyLayer and add a rule for export_artifact: 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 Web Gui. Nothing to install.

What risk level is export_artifact? +

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

Can I rate-limit export_artifact? +

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

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

export_artifact is provided by the Web Gui MCP server (thehzuo/gui-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.