set_par · Ice Puzzle MCP: Risk & Policy

WHAT IT DOES

What set_par does on Ice Puzzle

AI agents use set_par 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 set_par needs a policy

This is a Write operation because it creates or modifies data (the par value) in a reversible manner. A draft level's par can be changed or corrected later. It does not execute external operations, delete data irreversibly, or move financial resources.

From the tool's definition The tool 'set_par' modifies the par value of the current draft level, which is a configuration attribute. The description explicitly states it 'Set[s] explicit par (target shortest optimal move count)' — a value that affects level design and difficulty…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_par Rate-limited

set_par 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": {
    "set_par": {
      "limits": [
        {
          "counter": "set_par_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 set_par

What does the set_par tool do? +

Set explicit par (target shortest optimal move count) for the current draft. 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 set_par? +

Register the Ice Puzzle MCP server in PolicyLayer and add a rule for set_par: 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 set_par? +

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

Can I rate-limit set_par? +

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

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

set_par 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.