Get current standings for a fantasy league
AI agents call get_league_standings to retrieve information from Yahoo Fantasy MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves existing league standings data without modifying, deleting, or executing any operations. It is purely informational and read-only, consistent with the server's stated read-only nature. The blast radius of misuse is minimal—an agent could only access standings data that is typically public or already accessible to league members.
From the tool's definition Tool description states 'Get current standings for a fantasy league' and server description specifies 'read-only access to Yahoo Fantasy Sports data, enabling AI assistants to query league standings, player stats, matchups, and rosters.' No modification,…
Attacks that exploit this kind of access
Get current standings for a fantasy league. It is categorised as a Read tool in the Yahoo Fantasy MCP MCP Server, which means it retrieves data without modifying state.
Register the Yahoo Fantasy MCP server in PolicyLayer and add a rule for get_league_standings: 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 Yahoo Fantasy MCP. Nothing to install.
get_league_standings 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_league_standings 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_league_standings. 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_league_standings is provided by the Yahoo Fantasy MCP server (spilchen/yahoo_fantasy_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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