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flixbus_search

Search FlixBus bus and train routes in Europe. Get prices, times, duration, and booking links for your trip.

Instructions

Search FlixBus bus and train routes between cities in Europe. Returns prices, departure/arrival times, duration, transfers, and booking links. ~1 second.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
fromYesOrigin city (e.g. 'Copenhagen', 'Berlin', 'Paris')
toYesDestination city (e.g. 'Berlin', 'Rome', 'Amsterdam')
dateYesTravel date in YYYY-MM-DD format
adultsNoNumber of passengers (default: 1)
sortNoSort results (default: cheapest)cheapest
limitNoMaximum results (default: 10)
Behavior2/5

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

No annotations provided, so the description carries full burden. It mentions a ~1 second latency but does not disclose other behavioral traits like rate limits, authentication requirements, or any side effects. Read-only nature is implied but not stated.

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

Conciseness4/5

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

Two concise sentences: first states purpose and scope, second lists outputs and latency. No wasted words, but could be slightly more structured with bullet points for output fields.

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?

Given the tool's simplicity (6 params, 3 required, no output schema), the description adequately covers key outputs and performance. No critical missing information for this straightforward use case.

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 coverage is 100%, so the schema already documents all parameters with descriptions. The description does not add significant meaning beyond listing output types; the baseline of 3 is appropriate.

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?

The description clearly states the tool searches FlixBus bus and train routes between European cities, listing specific return data (prices, times, duration, transfers, booking links). This distinguishes it from sibling tools like search_flights or search_hotels.

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

Usage Guidelines3/5

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

No explicit when-to-use or when-not-to-use guidance. The description implies its context through the tool name and sibling differentiation, but lacks alternative recommendations or usage context.

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

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