settings_set · Live2d To Agent MCP: Risk & Policy

WHAT IT DOES

What settings_set does on Live2d To Agent

AI agents use settings_set to create or update resources in Live2d To Agent — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Live2d To Agent environment.

WHY IT NEEDS A POLICY

Why settings_set needs a policy

This tool creates or modifies configuration data for a Live2D desktop pet application. The changes are reversible (window dimensions can be changed back), have no destructive or financial impact, and do not execute arbitrary code or delete data. The blast radius of misuse is minimal—an AI agent could only resize the pet window or adjust other benign settings.

From the tool's definition Tool name 'settings_set' combined with description stating it modifies (修改) desktop pet settings including window dimensions. The description shows reversible configuration changes like width and height parameters.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

settings_set Rate-limited

settings_set 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": {
    "settings_set": {
      "limits": [
        {
          "counter": "settings_set_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 Live2d To Agent, so you can run agents against it safely.

FAQ

Questions about settings_set

What does the settings_set tool do? +

修改桌面宠物设置。可修改：window.width(200-600)、window.height(260-800)、. It is categorised as a Write tool in the Live2d To Agent MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on settings_set? +

Register the Live2d To Agent MCP server in PolicyLayer and add a rule for settings_set: 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 Live2d To Agent. Nothing to install.

What risk level is settings_set? +

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

Can I rate-limit settings_set? +

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

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

settings_set is provided by the Live2d To Agent MCP server (lmy414/live2d-to-agent). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.