rpc_dismiss_overlays · Rpcclient MCP: Risk & Policy

WHAT IT DOES

What rpc_dismiss_overlays does on Rpcclient

AI agents invoke rpc_dismiss_overlays to trigger actions in Rpcclient. 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 rpc_dismiss_overlays needs a policy

This tool triggers an external operation on an iOS device — dismissing UI overlays such as authentication sheets. It performs an action with side effects (interacting with live UI state on a remote iOS device) rather than simply reading data.

From the tool's definition Dismiss known transient overlays (for example Safari auth sheets)

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

rpc_dismiss_overlays Rate-limited

rpc_dismiss_overlays 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": {
    "rpc_dismiss_overlays": {
      "limits": [
        {
          "counter": "rpc_dismiss_overlays_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 Rpcclient, so you can run agents against it safely.

FAQ

Questions about rpc_dismiss_overlays

What does the rpc_dismiss_overlays tool do? +

Dismiss known transient overlays (for example Safari auth sheets). It is categorised as a Execute tool in the Rpcclient MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on rpc_dismiss_overlays? +

Register the Rpcclient MCP server in PolicyLayer and add a rule for rpc_dismiss_overlays: 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 Rpcclient. Nothing to install.

What risk level is rpc_dismiss_overlays? +

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

Can I rate-limit rpc_dismiss_overlays? +

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

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

rpc_dismiss_overlays is provided by the Rpcclient MCP server (appknox/rpcclient-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.