ui_type

Type text into the currently focused field using simulated keystrokes via System Events. Optionally activate a specific app first. Requires Accessibility permissions.

SERVERAirMCP SOURCEairmcp

High RISK CLASS

Category Execute

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/heznpc-airmcp/ui-type.md

WHAT IT DOES

What ui_type does on AirMCP

AI agents invoke ui_type to trigger actions in AirMCP. 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.

RISK

Why ui_type is rated High

This tool simulates keyboard input into whatever field currently has focus, which is an external operation whose effects entirely depend on context and arguments. It can type into any application — including terminal, password fields, forms, or chat — making it high severity since an AI agent could inject arbitrary text into sensitive or dangerous contexts.

From the tool's definition 'Type text into the currently focused field using simulated keystrokes via System Events' — this triggers external OS-level input simulation via accessibility APIs

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs ui_type safely

PolicyLayer is an MCP gateway: it sits between your AI agents and AirMCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For ui_type, this is the rule to start with:

ui_type Rate-limited

ui_type 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": {
    "ui_type": {
      "limits": [
        {
          "counter": "ui_type_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect AirMCP, apply this rule, and every ui_type call is checked against it from then on.

FAQ

Questions about ui_type

What does the ui_type tool do? +

Type text into the currently focused field using simulated keystrokes via System Events. Optionally activate a specific app first. Requires Accessibility permissions. It is categorised as a Execute tool in the AirMCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on ui_type? +

Register the Air MCP server in PolicyLayer and add a rule for ui_type: 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 AirMCP. Nothing to install.

What risk level is ui_type? +

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

Can I rate-limit ui_type? +

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

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

ui_type is provided by the Air MCP server (airmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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