Get the league scoreboard (all head-to-head matchups). Pass a week to view a specific week, otherwise the current week is returned.
AI agents call get_matchups to retrieve information from Yahoo Fantasy Baseball without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
week | integer | — | Week number |
leagueKey | string | — | League key; defaults to configured league |
Parameters from the server's own tool schema.
This tool fetches and displays fantasy baseball matchup information for a specified or current week. It performs a read-only query operation with no side effects, data modifications, or external state changes. The blast radius of misuse is minimal since it only exposes league scoreboard information that is typically viewable by league participants.
From the tool's definition 'Get the league scoreboard (all head-to-head matchups)' - retrieves matchup data without modifying any state
Attacks that exploit this kind of access
Get the league scoreboard (all head-to-head matchups). Pass a week to view a specific week, otherwise the current week is returned. It is categorised as a Read tool in the Yahoo Fantasy Baseball MCP Server, which means it retrieves data without modifying state.
get_matchups accepts 2 parameters: week, leagueKey. The full parameter table on this page comes from the server's own tool schema.
Register the Yahoo Fantasy Baseball MCP server in PolicyLayer and add a rule for get_matchups: 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 Baseball. Nothing to install.
get_matchups 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_matchups 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_matchups. 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_matchups is provided by the Yahoo Fantasy Baseball MCP server (yahoo-fantasy-baseball-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
get_matchups is one line of Yahoo Fantasy Baseball's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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