mcp_file_copy · ShowDoc MCP Server MCP: Risk & Policy

WHAT IT DOES

What mcp_file_copy does on ShowDoc MCP Server

AI agents use mcp_file_copy to create or update resources in ShowDoc MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your ShowDoc MCP Server environment.

WHY IT NEEDS A POLICY

Why mcp_file_copy needs a policy

File copying creates new file system entries and can overwrite existing files, which constitutes reversible data modification. While not destructive by itself (original remains), it modifies file system state. Severity is medium because uncontrolled copying could exhaust disk space or expose sensitive files, but it is reversible and the original source remains intact.

From the tool's definition Tool name 'mcp_file_copy' and description '复制一个文件或目录' (Copy a file or directory) - this is a file operation that creates or modifies data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

mcp_file_copy Rate-limited

mcp_file_copy 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "mcp_file_copy": {
      "limits": [
        {
          "counter": "mcp_file_copy_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches ShowDoc MCP Server, so you can run agents against it safely.

FAQ

Questions about mcp_file_copy

What does the mcp_file_copy tool do? +

复制一个文件或目录。. It is categorised as a Write tool in the ShowDoc MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on mcp_file_copy? +

Register the ShowDoc MCP Server MCP server in PolicyLayer and add a rule for mcp_file_copy: 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 ShowDoc MCP Server. Nothing to install.

What risk level is mcp_file_copy? +

mcp_file_copy is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit mcp_file_copy? +

Yes. Add a rate_limit block to the mcp_file_copy 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.

How do I block mcp_file_copy completely? +

Set action: deny in the PolicyLayer policy for mcp_file_copy. 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.

What MCP server provides mcp_file_copy? +

mcp_file_copy is provided by the ShowDoc MCP Server MCP server (yfcyfc123234/showdoc_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.