sdk_toggle · UI Bridge MCP: Risk & Policy

WHAT IT DOES

What sdk_toggle does on UI Bridge MCP

AI agents invoke sdk_toggle to trigger actions in UI Bridge MCP. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why sdk_toggle needs a policy

Toggling a checkbox is a UI interaction that triggers an action in an external application. It modifies UI state and potentially triggers downstream application behavior, making it an Execute action. The blast radius is medium since toggling checkboxes can enable/disable features or settings in an external app, but is generally reversible.

From the tool's definition Toggle a checkbox in the SDK app

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

sdk_toggle Rate-limited

sdk_toggle 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.

View as policy code

policy.json

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

RATE-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 Bridge MCP, so you can run agents against it safely.

FAQ

Questions about sdk_toggle

What does the sdk_toggle tool do? +

Toggle a checkbox in the SDK app. It is categorised as a Execute tool in the UI Bridge MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on sdk_toggle? +

Register the UI Bridge MCP server in PolicyLayer and add a rule for sdk_toggle: 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 Bridge MCP. Nothing to install.

What risk level is sdk_toggle? +

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

Can I rate-limit sdk_toggle? +

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

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

sdk_toggle is provided by the UI Bridge MCP server (qontinui/ui-bridge-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.