Paste clipboard content to files/directories
AI agents use clipboard_paste to create or update resources in Clippy — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Clippy environment.
This tool modifies files by writing clipboard content to them. While not destructive (writes are reversible if the target file is backed up), it is Write-category because it creates or modifies data.
From the tool's definition clipboard_paste: Paste clipboard content to files/directories. The tool writes unvalidated clipboard content directly to the filesystem.
Documented attack patterns abuse exactly the kind of access clipboard_paste gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Clippy, and nothing reaches the server without passing your rules. This is the rule we recommend for clipboard_paste:
{
"version": "1",
"default": "deny",
"tools": {
"clipboard_paste": {
"limits": [
{
"counter": "clipboard_paste_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}clipboard_paste 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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Paste clipboard content to files/directories. It is categorised as a Write tool in the Clippy MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Clippy MCP server in PolicyLayer and add a rule for clipboard_paste: 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 Clippy. Nothing to install.
clipboard_paste 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_paste 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_paste. 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_paste is provided by the Clippy MCP server (neilberkman/clippy). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Clippy, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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7 Clippy tools catalogued and risk-classified — across an index of 43,000+ MCP servers.