search_roundtrip_flights
Search real-time round-trip flights from Google Flights, priced as paired legs rather than two separate one-ways. IMPORTANT: for any flexible search, make ONE call. Pass departure_date_from / departure_date_to for a departure range, and nights instead of return_date to search trip lengths -- '5 t...
This record as markdown: /tools/com-flightpowers-freemium-google-flights-and-booking/search-roundtrip-flights.md
What search_roundtrip_flights does on Free Flight and Hotel Search (no API key)
AI agents call search_roundtrip_flights to retrieve information from Free Flight and Hotel Search (no API key) without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
limit | integer | — | |
nights | object | — | |
sort_by | string | — | |
currency | string | — | |
max_price | object | — | |
seat_type | object | — | |
passengers | object | — | |
to_airport | object | Yes | |
return_date | object | — | |
from_airport | string | Yes | |
use_fallback | boolean | — | |
departure_date | object | — |
Parameters from the server's own tool schema.
Why search_roundtrip_flights is rated Low
Tool retrieves flight data without creating, modifying, or deleting any records.
From the tool's definition Search real-time round-trip flights from Google Flights, priced as paired legs.
Risk signalsHigh parameter count (18 properties)
Attacks that exploit this kind of access
The rule that runs search_roundtrip_flights safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Free Flight and Hotel Search (no API key), and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For search_roundtrip_flights, this is the rule to start with:
search_roundtrip_flights is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Free Flight and Hotel Search (no API key), apply this rule, and every search_roundtrip_flights call is checked against it from then on.
Questions about search_roundtrip_flights
Search real-time round-trip flights from Google Flights, priced as paired legs rather than two separate one-ways. IMPORTANT: for any flexible search, make ONE call. Pass departure_date_from / departure_date_to for a departure range, and nights instead of return_date to search trip lengths -- '5 to 7 nights in Rome sometime in May' is one call. FREE TIER LIMIT: one call searches at most 15 departure-date x nights combinations. A wider request is sampled evenly rather than rejected, and returns truncated: true plus the exact dates searched in search_coverage.departure_dates_searched. A date absent from that list was never searched -- which is not the same as having no flights. Returns total price for both legs, per-leg airline, stops and duration, and a single bookable buy_link covering the trip. It is categorised as a Read tool in the Free Flight and Hotel Search (no API key) MCP Server, which means it retrieves data without modifying state.
search_roundtrip_flights accepts 12 parameters: limit, nights, sort_by, currency, max_price, seat_type, passengers, to_airport, return_date, from_airport, use_fallback, departure_date. Required: to_airport, from_airport. The full parameter table on this page comes from the server's own tool schema.
Register the Free Flight and Hotel Search (no API key) MCP server in PolicyLayer and add a rule for search_roundtrip_flights: 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 Free Flight and Hotel Search (no API key). Nothing to install.
search_roundtrip_flights 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 search_roundtrip_flights 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 search_roundtrip_flights. 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.
search_roundtrip_flights is provided by the Free Flight and Hotel Search (no API key) MCP server (https://lulu.flightpowers.com/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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