AI agents call get_turn to retrieve information from MCP Chess Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a simple query that returns current turn state from an ongoing chess game. It performs no write, execute, destructive, or financial operations. It has minimal blast radius if misused by an AI agent—worst case it provides stale turn information. Classified as Read with low severity.
From the tool's definition Tool name 'get_turn' and description 'Indicates whose turn it is' show this merely retrieves game state information without modification. No side effects mentioned.
Documented attack patterns abuse exactly the kind of access get_turn gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and MCP Chess Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_turn:
{
"version": "1",
"default": "deny",
"tools": {
"get_turn": {}
}
}get_turn is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Indicates whose turn it is ('white' or 'black'). It is categorised as a Read tool in the MCP Chess Server MCP Server, which means it retrieves data without modifying state.
Register the MCP Chess Server MCP server in PolicyLayer and add a rule for get_turn: 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 MCP Chess Server. Nothing to install.
get_turn 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 get_turn 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 get_turn. 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.
get_turn is provided by the MCP Chess Server MCP server (jiayao/mcp-chess). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from MCP Chess Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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6 MCP Chess Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.