add_thin_ice · Ice Puzzle MCP: Risk & Policy

WHAT IT DOES

What add_thin_ice does on Ice Puzzle

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

WHY IT NEEDS A POLICY

Why add_thin_ice needs a policy

This tool adds game elements (thin ice tiles) to an Ice Puzzle level during the design phase. This is a Write operation because it creates or modifies game level data reversibly. The effects are limited to level design state and can be undone (evidenced by sibling tools like 'clear_level' and 'delete_draft').

From the tool's definition Tool name 'add_thin_ice' and description 'Add thin ice tiles (break after crossing)' indicate the tool creates or modifies level design elements.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_thin_ice Rate-limited

add_thin_ice 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": {
    "add_thin_ice": {
      "limits": [
        {
          "counter": "add_thin_ice_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 Ice Puzzle, so you can run agents against it safely.

FAQ

Questions about add_thin_ice

What does the add_thin_ice tool do? +

Add thin ice tiles (break after crossing). It is categorised as a Write tool in the Ice Puzzle MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on add_thin_ice? +

Register the Ice Puzzle MCP server in PolicyLayer and add a rule for add_thin_ice: 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 Ice Puzzle. Nothing to install.

What risk level is add_thin_ice? +

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

Can I rate-limit add_thin_ice? +

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

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

add_thin_ice is provided by the Ice Puzzle MCP server (wmoten/ice-puzzle-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.