flag_cell · Minesweeper MCP Server MCP: Risk & Policy

WHAT IT DOES

What flag_cell does on Minesweeper MCP Server

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

WHY IT NEEDS A POLICY

Why flag_cell needs a policy

This tool modifies the state of a Minesweeper game board by toggling a flag on a cell. It is a reversible write operation (flagging can be undone by unflagging), with no real-world side effects, financial implications, or destructive consequences. The blast radius of misuse is minimal — it only affects an in-memory game state.

From the tool's definition Flag or unflag a cell on the Minesweeper board

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

flag_cell Rate-limited

flag_cell 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": {
    "flag_cell": {
      "limits": [
        {
          "counter": "flag_cell_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 Minesweeper MCP Server, so you can run agents against it safely.

FAQ

Questions about flag_cell

What does the flag_cell tool do? +

Flag or unflag a cell on the Minesweeper board. It is categorised as a Write tool in the Minesweeper MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on flag_cell? +

Register the Minesweeper MCP Server MCP server in PolicyLayer and add a rule for flag_cell: 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 Minesweeper MCP Server. Nothing to install.

What risk level is flag_cell? +

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

Can I rate-limit flag_cell? +

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

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

flag_cell is provided by the Minesweeper MCP Server MCP server (vic563/mindsweeper-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.