SlickTrip

Airlines on a route

route_airlines

Read-onlyIdempotent

Use when the traveler asks who flies a route, or before filtering by airline: the carriers on the route, nonstop ones first, with the codes the airlines filters take. Not a fare search.

Input Schema

Name	Required	Description	Default
`origin`	Yes	A 3-letter airport code (JFK), or a city code that searches every airport in the city (SlickTrip's 4-letter codes: NYCA New York, LOND London, ROME Rome, TYOA Tokyo). Up to 3 places joined with _ search them together (JFK_EWR). A place name works when one place clearly matches; otherwise the result is an unknown_place error listing suggestions. When the traveler names a city rather than an airport, send the city (its name or code), not one of its airports: one airport can miss the cheapest or the only flights. Unsure of the code: call find_places.
`destination`	Yes	A 3-letter airport code (JFK), or a city code that searches every airport in the city (SlickTrip's 4-letter codes: NYCA New York, LOND London, ROME Rome, TYOA Tokyo). Up to 3 places joined with _ search them together (JFK_EWR). A place name works when one place clearly matches; otherwise the result is an unknown_place error listing suggestions. When the traveler names a city rather than an airport, send the city (its name or code), not one of its airports: one airport can miss the cheapest or the only flights. Unsure of the code: call find_places.

Output Schema

Name	Required	Description
`code`	No	On an error: a machine-readable kind, e.g. unknown_place
`note`	No	Guidance for the assistant
`field`	No	On unknown_place: which argument (origin, destination, ...)
`origin`	No	Origin code
`status`	No	ok \| no_data \| error \| sign_in_required
`message`	No	Error or sign-in text
`airlines`	No	code, name, nonstop
`destination`	No	Destination code
`suggestions`	No	On unknown_place: places to offer the traveler, each with code, name, kind (airport, all airports in the city, nearby airport), city, country
`places_assumed`	No	Place names this call resolved on its own, e.g. 'Portland = Portland, OR (PDX)'; tell the traveler

Schema Changelog

Changes observed during successful MCP inspections.

Changed2 schema fields changedOct 9, 2026

changedInput schema / properties / destination / description

Previous value: -"A 3-letter airport code (JFK), or a city code that searches every airport in the city (SlickTrip's 4-letter codes: NYCA New York, LOND London, ROME Rome, TYOA Tokyo). Up to 3 places joined with _ search them together (JFK_EWR). A place name works when one place clearly matches; otherwise the result is an unknown_place error listing suggestions. Unsure of the code: call find_places."New value: +"A 3-letter airport code (JFK), or a city code that searches every airport in the city (SlickTrip's 4-letter codes: NYCA New York, LOND London, ROME Rome, TYOA Tokyo). Up to 3 places joined with _ search them together (JFK_EWR). A place name works when one place clearly matches; otherwise the result is an unknown_place error listing suggestions. When the traveler names a city rather than an airport, send the city (its name or code), not one of its airports: one airport can miss the cheapest or the only flights. Unsure of the code: call find_places."

changedInput schema / properties / origin / description

Previous value: -"A 3-letter airport code (JFK), or a city code that searches every airport in the city (SlickTrip's 4-letter codes: NYCA New York, LOND London, ROME Rome, TYOA Tokyo). Up to 3 places joined with _ search them together (JFK_EWR). A place name works when one place clearly matches; otherwise the result is an unknown_place error listing suggestions. Unsure of the code: call find_places."New value: +"A 3-letter airport code (JFK), or a city code that searches every airport in the city (SlickTrip's 4-letter codes: NYCA New York, LOND London, ROME Rome, TYOA Tokyo). Up to 3 places joined with _ search them together (JFK_EWR). A place name works when one place clearly matches; otherwise the result is an unknown_place error listing suggestions. When the traveler names a city rather than an airport, send the city (its name or code), not one of its airports: one airport can miss the cheapest or the only flights. Unsure of the code: call find_places."

Changed4 schema fields changedOct 6, 2026

changedInput schema / properties / destination / description

Previous value: -"A 3-letter airport code (JFK), or a city code that searches every airport in the city (NYC, LON, ROM, TYO). Up to 3 airports joined with _ search them together (JFK_EWR). A place name works when one place clearly matches; otherwise the result is an unknown_place error listing suggestions. Unsure of the code: call find_places."New value: +"A 3-letter airport code (JFK), or a city code that searches every airport in the city (SlickTrip's 4-letter codes: NYCA New York, LOND London, ROME Rome, TYOA Tokyo). Up to 3 places joined with _ search them together (JFK_EWR). A place name works when one place clearly matches; otherwise the result is an unknown_place error listing suggestions. Unsure of the code: call find_places."

changedInput schema / properties / destination / examples

Previous value: -[
-  "JFK",
-  "ROM",
-  "JFK_EWR"
-]New value: +[
+  "JFK",
+  "NYCA",
+  "JFK_EWR"
+]

changedInput schema / properties / origin / description

Previous value: -"A 3-letter airport code (JFK), or a city code that searches every airport in the city (NYC, LON, ROM, TYO). Up to 3 airports joined with _ search them together (JFK_EWR). A place name works when one place clearly matches; otherwise the result is an unknown_place error listing suggestions. Unsure of the code: call find_places."New value: +"A 3-letter airport code (JFK), or a city code that searches every airport in the city (SlickTrip's 4-letter codes: NYCA New York, LOND London, ROME Rome, TYOA Tokyo). Up to 3 places joined with _ search them together (JFK_EWR). A place name works when one place clearly matches; otherwise the result is an unknown_place error listing suggestions. Unsure of the code: call find_places."

changedInput schema / properties / origin / examples

Previous value: -[
-  "JFK",
-  "ROM",
-  "JFK_EWR"
-]New value: +[
+  "JFK",
+  "NYCA",
+  "JFK_EWR"
+]

First observedOct 5, 2026

TDQS

A4.4/5.0

Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnly, idempotent, openWorld and non-destructive, so safety is covered. The description still adds non-trivial behavior the annotations do not: nonstop-first ordering and the fact that returned codes are the same codes the airline filters accept, which matters for chaining into a filtered search. It stops short of describing pagination or result size, so a 4 rather than a 5.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

One dense sentence opening with the usage trigger, followed by a three-word exclusion. Every clause earns its place and the most decision-relevant information is front-loaded.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

An output schema exists, so return values need no explanation, and the description covers purpose, trigger conditions, ordering and the nearest competing tool. Only the error/edge path (unknown_place handling) is left entirely to the schema, which is a minor gap for a read-only lookup.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100% and both parameters carry exhaustive guidance (airport vs city codes, underscore-joined multi-place, unknown_place errors, find_places fallback). The description adds nothing parameter-specific beyond the code-format hint implied by 'codes the airlines filters take', so the baseline 3 applies.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb and resource ('the carriers on the route') plus the ordering rule ('nonstop ones first'), and explicitly distinguishes itself from a fare search. An agent can tell it apart from search_flights or flight_lookup without opening either schema.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Gives two concrete triggers ('the traveler asks who flies a route', 'before filtering by airline') and an explicit exclusion ('Not a fare search'), which routes the agent away from the fare/booking siblings. Nothing about when to reach for this tool is left to inference.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

All SlickTrip tools Inspect

Try in Browser

One endpoint for every MCP toolRayrun runs every MCP server behind one URL and holds the credentials. Each call is decided per client, tool, and argument, then recorded.ray.runAd

Glama MCP Gateway

Add one secure layer between your agents and this server.

Resources

Need Help?