Filter flights from a search by specific airlines.
AI agents call filter_flights_by_airline to retrieve information from MCP Travel Planner 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 operation on flight search results. It retrieves a subset of flights matching specified airline criteria without creating, modifying, deleting, or executing any external operations. The action has no side effects and poses minimal security risk, making it a Read category tool with low severity.
From the tool's definition The tool 'filter_flights_by_airline' filters flights from a search result by specific airlines. The verb 'filter' indicates querying or narrowing existing data with no modification or side effects. This is a data retrieval operation.
Attacks that exploit this kind of access
Filter flights from a search by specific airlines. It is categorised as a Read tool in the MCP Travel Planner MCP Server, which means it retrieves data without modifying state.
Register the MCP Travel Planner MCP server in PolicyLayer and add a rule for filter_flights_by_airline: 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 MCP Travel Planner. Nothing to install.
filter_flights_by_airline 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 filter_flights_by_airline 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 filter_flights_by_airline. 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.
filter_flights_by_airline is provided by the MCP Travel Planner MCP server (leonavevor/mcp_travelassistant). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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