AI agents call get_lottery_by_code to retrieve information from Lottery without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves historical lottery drawing data based on a period code. It performs a lookup operation without side effects, aligning with the Read category definition of querying data with no side effects. The low severity reflects minimal risk—misuse would only expose publicly available historical lottery information.
From the tool's definition Tool name 'get_lottery_by_code' and description '按期号查询双色球开奖数据' (query double-color ball lottery data by period code) indicates a data retrieval operation. The verb '查询' (query/retrieve) is read-only with no modification or deletion capabilities.
Attacks that exploit this kind of access
按期号查询双色球开奖数据. It is categorised as a Read tool in the Lottery MCP Server, which means it retrieves data without modifying state.
Register the Lottery MCP server in PolicyLayer and add a rule for get_lottery_by_code: 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 Lottery. Nothing to install.
get_lottery_by_code 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_lottery_by_code 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_lottery_by_code. 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_lottery_by_code is provided by the Lottery MCP server (lumosylva/lottery-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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