AI agents call sleeper_league_rosters 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 |
|---|---|---|---|
league_id | string | Yes |
Parameters from the server's own tool schema.
This tool retrieves roster information from a Sleeper fantasy sports league. The verb 'Get' and the read-only nature of querying league roster data confirm this is a Read operation. No data is modified, deleted, or financial transactions are involved. Severity is low as misuse would only result in unauthorized access to publicly or semi-public fantasy league roster data.
From the tool's definition Tool name 'sleeper_league_rosters' and description 'Get rosters for a Sleeper fantasy league' indicates a data retrieval operation with no modification or side effects.
Attacks that exploit this kind of access
Get rosters for a Sleeper fantasy league. It is categorised as a Read tool in the UnClick MCP Server, which means it retrieves data without modifying state.
sleeper_league_rosters accepts 1 parameter: league_id. Required: league_id. 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 sleeper_league_rosters: 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.
sleeper_league_rosters 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 sleeper_league_rosters 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 sleeper_league_rosters. 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.
sleeper_league_rosters 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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