Compare stats between two players
AI agents call lol_compare_players to retrieve information from League of Legends 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 and compares existing player statistics, which is a read-only operation. There are no side effects, no data modifications, no code execution, and no destructive actions. The worst-case misuse scenario (an AI comparing players it shouldn't have access to) is mitigated by the underlying API's permission model and results in low security impact.
From the tool's definition Tool name 'lol_compare_players' and description 'Compare stats between two players' indicate data retrieval and comparison operations with no modification, deletion, or execution capabilities.
Attacks that exploit this kind of access
Compare stats between two players. It is categorised as a Read tool in the League of Legends MCP Server MCP Server, which means it retrieves data without modifying state.
Register the League of Legends MCP Server MCP server in PolicyLayer and add a rule for lol_compare_players: 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 League of Legends MCP Server. Nothing to install.
lol_compare_players 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 lol_compare_players 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 lol_compare_players. 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.
lol_compare_players is provided by the League of Legends MCP Server MCP server (rexlmanu/lol-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
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