Copy a specific history item back to current clipboard
AI agents use copy_to_clipboard to create or update resources in Maccy Clipboard MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Maccy Clipboard MCP environment.
This tool writes data to the system clipboard, which modifies the current state of the clipboard. While the action is reversible (the clipboard can be overwritten with other content), it represents a write operation that could allow an AI agent to inject arbitrary content into the clipboard, potentially affecting subsequent paste operations or being used to exfiltrate sensitive data.
From the tool's definition Tool name 'copy_to_clipboard' and description 'Copy a specific history item back to current clipboard' indicates modification of the clipboard state.
Documented attack patterns abuse exactly the kind of access copy_to_clipboard gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Maccy Clipboard MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for copy_to_clipboard:
{
"version": "1",
"default": "deny",
"tools": {
"copy_to_clipboard": {
"limits": [
{
"counter": "copy_to_clipboard_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}copy_to_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.
Free to start. No card required.
Copy a specific history item back to current clipboard. It is categorised as a Write tool in the Maccy Clipboard MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Maccy Clipboard MCP server in PolicyLayer and add a rule for copy_to_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 Maccy Clipboard MCP. Nothing to install.
copy_to_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 copy_to_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 copy_to_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.
copy_to_clipboard is provided by the Maccy Clipboard MCP server (vlad-ds/maccy-clipboard-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Maccy Clipboard MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
8 Maccy Clipboard MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.