🔝 Get the player's top champion masteries.
AI agents call get_top_champions_tool to retrieve information from MCP Riot Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves existing player champion mastery data from the Riot Games API. It performs a query operation with no ability to modify, delete, or execute code. The data returned is public game statistics. The blast radius of misuse is minimal—an AI could only retrieve information the player already has access to.
From the tool's definition Tool name 'get_top_champions_tool' with description 'Get the player's top champion masteries' indicates data retrieval only. The verb 'Get' and the context of retrieving mastery statistics (read-only game statistics) confirm no modifications or side effects.
Documented attack patterns abuse exactly the kind of access get_top_champions_tool gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and MCP Riot Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_top_champions_tool:
{
"version": "1",
"default": "deny",
"tools": {
"get_top_champions_tool": {}
}
}get_top_champions_tool is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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🔝 Get the player's top champion masteries. It is categorised as a Read tool in the MCP Riot Server MCP Server, which means it retrieves data without modifying state.
Register the MCP Riot Server MCP server in PolicyLayer and add a rule for get_top_champions_tool: 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 Riot Server. Nothing to install.
get_top_champions_tool 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_top_champions_tool 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_top_champions_tool. 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_top_champions_tool is provided by the MCP Riot Server MCP server (jifrozen0110/mcp-riot). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from MCP Riot Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
5 MCP Riot Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.