AI agents call read_clipboard to retrieve information from uiautomator2 MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool retrieves clipboard data from an Android device without performing any write, execute, or destructive operations. Clipboard reading is a non-destructive information retrieval action. Severity is low because clipboard access typically exposes only data the user has already copied, with minimal blast radius unless sensitive credentials are unexpectedly present.
From the tool's definition Tool name 'read_clipboard' directly indicates retrieval of clipboard contents without modification. The server context (Android device control via uiautomator2) and sibling tools (which include app_start, app_stop, app_install—clearly modifying tools) support…
Documented attack patterns abuse exactly the kind of access read_clipboard gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and uiautomator2 MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for read_clipboard:
{
"version": "1",
"default": "deny",
"tools": {
"read_clipboard": {}
}
}read_clipboard is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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read_clipboard. It is categorised as a Read tool in the uiautomator2 MCP Server MCP Server, which means it retrieves data without modifying state.
Register the uiautomator2 MCP Server MCP server in PolicyLayer and add a rule for read_clipboard: 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 uiautomator2 MCP Server. Nothing to install.
read_clipboard is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the read_clipboard 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 read_clipboard. 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.
read_clipboard is provided by the uiautomator2 MCP Server MCP server (tanbro/uiautomator2-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from uiautomator2 MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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77 uiautomator2 MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.