城市天气查询 - 根据城市名查询天气信息。支持武汉、北京、上海等主要城市。如果不提供日期，默认查询今天和明天的天气数据
AI agents call getWeatherByCity to retrieve information from Flight Ticket MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries weather data with no side effects. It is a pure read operation that returns existing data without creating, modifying, deleting, or executing any operations. The blast radius of misuse is minimal—an AI agent could return inaccurate weather to a user, but cannot cause financial, operational, or system harm.
From the tool's definition Tool queries weather information by city name (城市天气查询 - 根据城市名查询天气信息). Returns weather data for today and tomorrow by default. No modification, deletion, or execution of external operations.
Documented attack patterns abuse exactly the kind of access getWeatherByCity gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Flight Ticket MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for getWeatherByCity:
{
"version": "1",
"default": "deny",
"tools": {
"getWeatherByCity": {}
}
}getWeatherByCity is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
城市天气查询 - 根据城市名查询天气信息。支持武汉、北京、上海等主要城市。如果不提供日期，默认查询今天和明天的天气数据. It is categorised as a Read tool in the Flight Ticket MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Flight Ticket MCP Server MCP server in PolicyLayer and add a rule for getWeatherByCity: 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 Flight Ticket MCP Server. Nothing to install.
getWeatherByCity 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 getWeatherByCity 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 getWeatherByCity. 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.
getWeatherByCity is provided by the Flight Ticket MCP Server MCP server (xiaonieli7/flightticketmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 10 Flight Ticket MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
10 Flight Ticket MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.