fm_restore_file · K-Personal MCP: Risk & Policy

WHAT IT DOES

What fm_restore_file does on K-Personal MCP

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

WHY IT NEEDS A POLICY

Why fm_restore_file needs a policy

File restoration is a Write operation—it creates or modifies files in the filesystem, reversing a previous deletion. While it restores rather than deletes, the net effect is data modification. Severity is high because careless restoration (wrong target location, overwriting active files, restoring malicious content) could corrupt user data or system state.

From the tool's definition Tool name 'fm_restore_file' and description indicate it restores/recovers files from backup to either original or specified location. This modifies the filesystem by creating or overwriting files.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

fm_restore_file Rate-limited

fm_restore_file 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": {
    "fm_restore_file": {
      "limits": [
        {
          "counter": "fm_restore_file_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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

FAQ

Questions about fm_restore_file

What does the fm_restore_file tool do? +

백업에서 파일을 복구합니다. 원본 위치 또는 지정 위치로 복구 가능. It is categorised as a Write tool in the K-Personal MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on fm_restore_file? +

Register the K-Personal MCP server in PolicyLayer and add a rule for fm_restore_file: 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 K-Personal MCP. Nothing to install.

What risk level is fm_restore_file? +

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

Can I rate-limit fm_restore_file? +

Yes. Add a rate_limit block to the fm_restore_file 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 fm_restore_file completely? +

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

fm_restore_file is provided by the K-Personal MCP server (lee30934-byte/k-personal-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.