AI agents call lichess_top_players to retrieve information from UnClick without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
nb | number | — | |
perfType | string | — | bullet, blitz, rapid, classical, etc. |
Parameters from the server's own tool schema.
This tool queries public leaderboard or ranking data from Lichess without modifying any state, deleting data, executing code, or committing financial transactions. The blast radius of misuse is minimal—an agent could retrieve rankings repeatedly but could not alter game outcomes, player accounts, or financial data. This is straightforward data retrieval.
From the tool's definition Tool retrieves top players for a game mode from Lichess. The verb 'get' and context of retrieving player rankings indicates a read-only query with no side effects.
Attacks that exploit this kind of access
Get top Lichess players for a game mode. It is categorised as a Read tool in the UnClick MCP Server, which means it retrieves data without modifying state.
lichess_top_players accepts 2 parameters: nb, perfType. The full parameter table on this page comes from the server's own tool schema.
Register the UnClick MCP server in PolicyLayer and add a rule for lichess_top_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 UnClick. Nothing to install.
lichess_top_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 lichess_top_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 lichess_top_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.
lichess_top_players is provided by the UnClick MCP server (@unclick/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.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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