Read from or write to the system clipboard.
AI agents use clipboard to create or update resources in Openowl — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Openowl environment.
While the tool supports read operations (category Read), the write capability to the system clipboard is the more severe function. Writing to clipboard can inject malicious content, credentials, or commands that a user might inadvertently paste into sensitive applications (e.g., password managers, terminals, financial systems). This has a substantial blast radius in a desktop automation context.
From the tool's definition Tool description states 'Read from or write to the system clipboard' — explicitly includes write capability to system clipboard.
Documented attack patterns abuse exactly the kind of access clipboard gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Openowl, and nothing reaches the server without passing your rules. This is the rule we recommend for clipboard:
{
"version": "1",
"default": "deny",
"tools": {
"clipboard": {
"limits": [
{
"counter": "clipboard_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}clipboard stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
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Read from or write to the system clipboard. It is categorised as a Write tool in the Openowl MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Openowl MCP server in PolicyLayer and add a rule for 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 Openowl. Nothing to install.
clipboard is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the 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 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.
clipboard is provided by the Openowl MCP server (mihir-kanzariya/openowl). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Openowl, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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40 Openowl tools catalogued and risk-classified — across an index of 43,000+ MCP servers.