app_register · K-Personal MCP: Risk & Policy

WHAT IT DOES

What app_register does on K-Personal MCP

AI agents use app_register 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 app_register needs a policy

This tool creates/modifies application alias metadata that enables future app launches by nickname. It is a reversible write operation (aliases can be updated or deleted) with minimal blast radius. It does not execute code, delete data irreversibly, move funds, or expose sensitive reads. The impact is limited to convenience configuration for the user's own desktop automation.

From the tool's definition Tool name 'app_register' and description indicating registration of app aliases ('앱 별명을 등록합니다' = 'Register app aliases'). Creates or stores a mapping in what appears to be a personal configuration or database.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

app_register Rate-limited

app_register 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": {
    "app_register": {
      "limits": [
        {
          "counter": "app_register_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 K-Personal MCP, so you can run agents against it safely.

FAQ

Questions about app_register

What does the app_register tool do? +

앱 별명을 등록합니다. 한 번 등록하면 이후 별명으로 실행 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 app_register? +

Register the K-Personal MCP server in PolicyLayer and add a rule for app_register: 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 app_register? +

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

Can I rate-limit app_register? +

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

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

app_register 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.