sdk_redo · UI Bridge MCP: Risk & Policy

WHAT IT DOES

What sdk_redo does on UI Bridge MCP

AI agents invoke sdk_redo 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_redo needs a policy

This tool executes a redo operation in an external app, which is a state-changing action whose side effects depend on what was previously undone. It does not merely read data (Read), nor does it permanently delete data (Destructive) or involve financial operations (Financial).

From the tool's definition Tool name 'sdk_redo' and description 'Execute redo in the connected SDK app' indicates the tool triggers an action (redo) in an external application controlled via SDK mode.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

sdk_redo Rate-limited

sdk_redo 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_redo": {
      "limits": [
        {
          "counter": "sdk_redo_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_redo

What does the sdk_redo tool do? +

Execute redo in the connected SDK app. Uses the 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_redo? +

Register the UI Bridge MCP server in PolicyLayer and add a rule for sdk_redo: 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_redo? +

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

Can I rate-limit sdk_redo? +

Yes. Add a rate_limit block to the sdk_redo 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_redo completely? +

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

sdk_redo 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.