mcp_file_backup · ShowDoc MCP Server MCP: Risk & Policy

WHAT IT DOES

What mcp_file_backup does on ShowDoc MCP Server

AI agents use mcp_file_backup 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_backup needs a policy

A file backup tool creates copies of existing files, which is a write operation (creating new data). It does not delete originals, so it is not Destructive. The description is very brief ('backup files' in Chinese), which limits confidence. Severity is medium because misuse could overwrite existing backup files or write large amounts of data to unintended locations.

From the tool's definition 备份文件 (backup files)

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

mcp_file_backup Rate-limited

mcp_file_backup 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_backup": {
      "limits": [
        {
          "counter": "mcp_file_backup_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_backup

What does the mcp_file_backup tool do? +

备份文件。. 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_backup? +

Register the ShowDoc MCP Server MCP server in PolicyLayer and add a rule for mcp_file_backup: 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_backup? +

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

Can I rate-limit mcp_file_backup? +

Yes. Add a rate_limit block to the mcp_file_backup 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_backup completely? +

Set action: deny in the PolicyLayer policy for mcp_file_backup. 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_backup? +

mcp_file_backup 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.