查询12306中转余票信息。尚且只支持查询前十条。
AI agents call get-interline-tickets to retrieve information from 12306 without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read-only query operation to search for available transfer tickets (中转余票) on the 12306 railway booking system. It retrieves and returns data with no side effects, no code execution, no data modification, and no financial transactions. The operation is purely informational and limited to the first 10 results.
From the tool's definition Tool name 'get-interline-tickets' and description '查询12306中转余票信息。尚且只支持查询前十条' (query 12306 interline transfer ticket availability information, currently only supports querying first ten results) indicate a query/search operation that retrieves ticket…
Documented attack patterns abuse exactly the kind of access get-interline-tickets gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and 12306, and nothing reaches the server without passing your rules. This is the rule we recommend for get-interline-tickets:
{
"version": "1",
"default": "deny",
"tools": {
"get-interline-tickets": {}
}
}get-interline-tickets is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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查询12306中转余票信息。尚且只支持查询前十条。. It is categorised as a Read tool in the 12306 MCP Server, which means it retrieves data without modifying state.
Register the 12306 MCP server in PolicyLayer and add a rule for get-interline-tickets: 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 12306. Nothing to install.
get-interline-tickets 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-interline-tickets 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-interline-tickets. 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-interline-tickets is provided by the 12306 MCP server (joooook/12306-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from 12306, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
8 12306 tools catalogued and risk-classified — across an index of 43,000+ MCP servers.