sdk_page_navigate · UI Bridge MCP: Risk & Policy

WHAT IT DOES

What sdk_page_navigate does on UI Bridge MCP

AI agents invoke sdk_page_navigate 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_page_navigate needs a policy

Navigation of UI pages is an Execute-category action because it triggers external operations whose effects depend on the target argument (which page/URL to navigate to). While not destructive or financial, it can cause side effects like loading untrusted content, triggering unintended workflows, or accessing sensitive pages if misused by an AI agent.

From the tool's definition Tool name 'sdk_page_navigate' combined with server context showing 'interact with UI elements' and 'control mode for the runner's own UI and SDK mode for external applications' indicates the tool navigates/controls UI pages.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

sdk_page_navigate Rate-limited

sdk_page_navigate 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_page_navigate": {
      "limits": [
        {
          "counter": "sdk_page_navigate_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_page_navigate

What does the sdk_page_navigate tool do? +

sdk_page_navigate. 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_page_navigate? +

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

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

Can I rate-limit sdk_page_navigate? +

Yes. Add a rate_limit block to the sdk_page_navigate 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_page_navigate completely? +

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

sdk_page_navigate 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.