swap_template · UI Preset MCP Server MCP: Risk & Policy

WHAT IT DOES

What swap_template does on UI Preset MCP Server

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

WHY IT NEEDS A POLICY

Why swap_template needs a policy

This tool modifies the active configuration state of the server by swapping the active preset. It is reversible (you can swap back) and does not delete data, execute arbitrary code, or involve financial operations. It writes/updates the session's active preset, potentially affecting all components being rendered in the IDE, giving it a medium blast radius if misused.

From the tool's definition Hot-swap the active preset without restarting the server... switching between client presets while building... Optionally preserves any runtime token overrides

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

swap_template Rate-limited

swap_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": {
    "swap_template": {
      "limits": [
        {
          "counter": "swap_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 UI Preset MCP Server, so you can run agents against it safely.

FAQ

Questions about swap_template

What does the swap_template tool do? +

Hot-swap the active preset without restarting the server. Useful for switching between client presets while building. Optionally preserves any runtime token overrides applied in the current session. Args: - preset_id (string): The preset to switch to - preserve_overrides (boolean): Keep current overrides after swap (default: false) Returns: New active preset summary. It is categorised as a Write tool in the UI Preset MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on swap_template? +

Register the UI Preset MCP Server MCP server in PolicyLayer and add a rule for swap_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 UI Preset MCP Server. Nothing to install.

What risk level is swap_template? +

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

Can I rate-limit swap_template? +

Yes. Add a rate_limit block to the swap_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 swap_template completely? +

Set action: deny in the PolicyLayer policy for swap_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 swap_template? +

swap_template is provided by the UI Preset MCP Server MCP server (ncsound919/og-glass). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.