write_in_chat · Lichess Integration MCP: Risk & Policy

WHAT IT DOES

What write_in_chat does on Lichess Integration

AI agents use write_in_chat 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
`room`	string	—	The chat room
`text`	string	—	The message to send
`gameId`	string	—	The game ID

Parameters from the server's own tool schema.

WHY IT NEEDS A POLICY

Why write_in_chat needs a policy

This tool creates new data (chat messages) reversibly without destructive or irreversible effects. Messages can be edited or deleted. It has no financial impact, does not execute arbitrary code, and fits the Write category for content creation. Severity is low because chat messages in a gaming context pose minimal risk—they are user-generated communications with limited blast radius even if an AI agent misuses them.

From the tool's definition Tool name 'write_in_chat' and description 'Write in the chat of a board game' explicitly indicate creating/posting chat messages within an existing game context.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

write_in_chat Rate-limited

write_in_chat 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": {
    "write_in_chat": {
      "limits": [
        {
          "counter": "write_in_chat_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 write_in_chat

What does the write_in_chat tool do? +

Write in the chat of a board game. 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 write_in_chat accept? +

write_in_chat accepts 3 parameters: room, text, gameId. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on write_in_chat? +

Register the Lichess Integration MCP server in PolicyLayer and add a rule for write_in_chat: 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 write_in_chat? +

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

Can I rate-limit write_in_chat? +

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

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

write_in_chat 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.