Use this tool when the user needs structured raw pricing data. It returns sale flights between two cities as a list of flights, and each flight contains cabin entries with prices. This is better than searchFlightItineraries when the caller needs per-flight, per-cabin price details instead of a na...
AI agents call getFlightPriceByCities to retrieve information from Variflight without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Even though getFlightPriceByCities only reads data, uncontrolled read access leaks sensitive information and racks up API costs — an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.
Attacks that exploit this kind of access
Use this tool when the user needs structured raw pricing data. It returns sale flights between two cities as a list of flights, and each flight contains cabin entries with prices. This is better than searchFlightItineraries when the caller needs per-flight, per-cabin price details instead of a natural-language recommendation summary. All city codes must be valid IATA 3-letter codes (e.g. BJS for Beijing, SHA for Shanghai, CAN for Guangzhou, HFE for Hefei). It is categorised as a Read tool in the Variflight MCP Server, which means it retrieves data without modifying state.
Register the Variflight MCP server in PolicyLayer and add a rule for getFlightPriceByCities: 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 Variflight. Nothing to install.
getFlightPriceByCities 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 getFlightPriceByCities 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 getFlightPriceByCities. 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.
getFlightPriceByCities is provided by the Variflight MCP server (@variflight-ai/variflight-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.