withdraw_from_simul · Lichess Integration MCP: Risk & Policy

WHAT IT DOES

What withdraw_from_simul does on Lichess Integration

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

PARAMETERS

Parameter	Type	Required	Description
`simulId`	string	—	ID of the simul

Parameters from the server's own tool schema.

WHY IT NEEDS A POLICY

Why withdraw_from_simul needs a policy

Withdrawing from a simultaneous exhibition (simul) is a reversible action that modifies the user's participation status in an event. It does not delete data or trigger irreversible destructive effects, but it does change state on the platform. The user could potentially rejoin, making this a Write-level action rather than Destructive.

From the tool's definition Withdraw from a simul

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

withdraw_from_simul Rate-limited

withdraw_from_simul 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": {
    "withdraw_from_simul": {
      "limits": [
        {
          "counter": "withdraw_from_simul_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 Integration, so you can run agents against it safely.

FAQ

Questions about withdraw_from_simul

What does the withdraw_from_simul tool do? +

Withdraw from a simul. It is categorised as a Write tool in the Lichess Integration MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does withdraw_from_simul accept? +

withdraw_from_simul accepts 1 parameter: simulId. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on withdraw_from_simul? +

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

What risk level is withdraw_from_simul? +

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

Can I rate-limit withdraw_from_simul? +

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

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

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