Check if a player is currently online on Chess.com
AI agents call is_player_online to retrieve information from Chess Com MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves real-time presence status of a Chess.com player, which is a read-only operation returning public information. There are no side effects, data modification, code execution, or destructive capabilities. The information retrieved is already public on Chess.com's platform.
From the tool's definition Tool name 'is_player_online' and description 'Check if a player is currently online on Chess.com' indicate a query operation that retrieves status information without modification, deletion, or execution of arbitrary code.
Documented attack patterns abuse exactly the kind of access is_player_online gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Chess Com MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for is_player_online:
{
"version": "1",
"default": "deny",
"tools": {
"is_player_online": {}
}
}is_player_online is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Check if a player is currently online on Chess.com. It is categorised as a Read tool in the Chess Com MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Chess Com MCP Server MCP server in PolicyLayer and add a rule for is_player_online: 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 Chess Com MCP Server. Nothing to install.
is_player_online 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 is_player_online 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 is_player_online. 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.
is_player_online is provided by the Chess Com MCP Server MCP server (pab1it0/chess-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 10 Chess Com MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
10 Chess Com MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.