Copy lines from a file to session clipboard
AI agents call copy_lines to retrieve information from Cut-Copy-Paste Clipboard Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool reads lines from a file and copies them to an in-memory clipboard. It does not modify, delete, or write any data — it is a pure read operation. The clipboard is session-scoped and the source file remains unchanged.
From the tool's definition Copy lines from a file to session clipboard
Attacks that exploit this kind of access
Copy lines from a file to session clipboard. It is categorised as a Read tool in the Cut-Copy-Paste Clipboard Server MCP Server, which means it retrieves data without modifying state.
Register the Cut-Copy-Paste Clipboard Server MCP server in PolicyLayer and add a rule for copy_lines: 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 Cut-Copy-Paste Clipboard Server. Nothing to install.
copy_lines 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 copy_lines 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_lines. 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_lines is provided by the Cut-Copy-Paste Clipboard Server MCP server (pr0j3c7t0dd-ltd/cut-copy-paste-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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