Get Lichess cloud engine evaluation for a chess position in FEN notation. Returns the best move, score, and top lines from Stockfish cloud analysis.
AI agents call lichess_cloud_eval to retrieve information from Lichess MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read-only operation—querying an external engine for chess position analysis. No data is created, modified, deleted, or irreversibly changed. No code execution, financial operations, or destructive actions occur. The only risk is information disclosure or resource exhaustion, both low-severity in the context of an AI agent interacting with a public chess analysis service.
From the tool's definition Tool retrieves analysis data ('Get Lichess cloud engine evaluation', 'Returns the best move, score, and top lines') without modifying state, executing commands, or causing side effects.
Attacks that exploit this kind of access
Get Lichess cloud engine evaluation for a chess position in FEN notation. Returns the best move, score, and top lines from Stockfish cloud analysis. It is categorised as a Read tool in the Lichess MCP MCP Server, which means it retrieves data without modifying state.
Register the Lichess MCP server in PolicyLayer and add a rule for lichess_cloud_eval: 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.
lichess_cloud_eval is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the lichess_cloud_eval 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.
Set action: deny in the PolicyLayer policy for lichess_cloud_eval. 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.
lichess_cloud_eval 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.
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