Type text into a UI element (text field, search box, etc). Locates the field, optionally clears it, then types.
AI agents invoke type_into to trigger actions in ScreenHand. 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.
This tool performs a native UI action — locating a UI element and typing text into it — which triggers external operations in the desktop environment. It goes beyond a simple write of data (like an API call) because it executes a real interaction via Accessibility APIs.
From the tool's definition 'Type text into a UI element (text field, search box, etc). Locates the field, optionally clears it, then types.'
Documented attack patterns abuse exactly the kind of access type_into gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and ScreenHand, and nothing reaches the server without passing your rules. This is the rule we recommend for type_into:
{
"version": "1",
"default": "deny",
"tools": {
"type_into": {
"limits": [
{
"counter": "type_into_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}type_into 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.
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Type text into a UI element (text field, search box, etc). Locates the field, optionally clears it, then types. It is categorised as a Execute tool in the ScreenHand MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the ScreenHand MCP server in PolicyLayer and add a rule for type_into: 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 ScreenHand. Nothing to install.
type_into is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the type_into 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.
Set action: deny in the PolicyLayer policy for type_into. 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.
type_into is provided by the ScreenHand MCP server (manushi4/screenhand). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from ScreenHand, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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89 ScreenHand tools catalogued and risk-classified — across an index of 43,000+ MCP servers.