List every probable starting pitcher across MLB for a date, with each one's opponent, home/away, and game start time (UTC). Sourced from the MLB Stats API (no Yahoo auth needed). MLB only posts probables for roughly today through ~2-3 days out, so 'tomorrow' returns a full board, the day after is...
AI agents call list_probable_starters 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 |
|---|---|---|---|
date | string | — | Date as YYYY-MM-DD; defaults to today. Use tomorrow/day-after for planning. |
fantasyContext | boolean | — | When true, annotate each starter with Yahoo ownership in the configured league. |
Parameters from the server's own tool schema.
This is a read-only query tool that fetches public MLB scheduling information and optionally enriches it with fantasy league context. It has no side effects, does not modify any data, and does not execute external operations beyond data retrieval. The optional 'fantasyContext' parameter merely annotates the response without changing state.
From the tool's definition Tool name 'list_probable_starters' and description indicate it retrieves and lists data: 'List every probable starting pitcher across MLB for a date' with details like 'opponent, home/away, and game start time'.
Risk signalsBulk/mass operation — affects multiple targets
Attacks that exploit this kind of access
List every probable starting pitcher across MLB for a date, with each one's opponent, home/away, and game start time (UTC). Sourced from the MLB Stats API (no Yahoo auth needed). MLB only posts probables for roughly today through ~2-3 days out, so 'tomorrow' returns a full board, the day after is usually partial, and dates further out return few or none (not yet announced — not an error). Set fantasyContext=true to also label each starter as yourTeam / otherTeam (with the owning manager) / freeAgent — useful for spotting streamable free-agent starters. Enrichment issues about one Yahoo request per starter (~10-26), so leave it off unless you need ownership. It is categorised as a Read tool in the Yahoo Fantasy Baseball MCP Server, which means it retrieves data without modifying state.
list_probable_starters accepts 2 parameters: date, fantasyContext. 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 list_probable_starters: 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.
list_probable_starters 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 list_probable_starters 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 list_probable_starters. 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.
list_probable_starters 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.
list_probable_starters 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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