lichess_decline_challenge · Lichess MCP: Risk & Policy

WHAT IT DOES

What lichess_decline_challenge does on Lichess MCP

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

WHY IT NEEDS A POLICY

Why lichess_decline_challenge needs a policy

Declining a challenge modifies the state of a pending challenge (from open to declined), which is a reversible/transactional write action. It does not delete data permanently, execute code, or involve finances. The blast radius is minimal — worst case is a missed game opportunity.

From the tool's definition Decline an incoming chess challenge on Lichess. Optionally provide a reason.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

lichess_decline_challenge Rate-limited

lichess_decline_challenge 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": {
    "lichess_decline_challenge": {
      "limits": [
        {
          "counter": "lichess_decline_challenge_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 Lichess MCP, so you can run agents against it safely.

FAQ

Questions about lichess_decline_challenge

What does the lichess_decline_challenge tool do? +

Decline an incoming chess challenge on Lichess. Optionally provide a reason. It is categorised as a Write tool in the Lichess 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 lichess_decline_challenge? +

Register the Lichess MCP server in PolicyLayer and add a rule for lichess_decline_challenge: 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 Lichess MCP. Nothing to install.

What risk level is lichess_decline_challenge? +

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

Can I rate-limit lichess_decline_challenge? +

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

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

lichess_decline_challenge is provided by the Lichess MCP server (jamespdaily/lichess-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.