google-flights-mcp

get_price_insights

Find cheapest travel dates for a route by scanning multiple departure dates within a specified date range.

Instructions

Find the cheapest travel dates for a route within a date range. Scans multiple departure dates.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "origin": "<origin>",
      "destination": "<destination>",
      "startDate": "<startDate>",
      "endDate": "<endDate>"
    },
    "name": "get_price_insights"
  }
}

Input Schema

Name	Required	Description	Default
`adults`	No
`origin`	Yes	Departure airport IATA code
`endDate`	Yes	End of date range (YYYY-MM-DD)
`startDate`	Yes	Start of date range (YYYY-MM-DD)
`cabinClass`	No		economy
`destination`	Yes	Arrival airport IATA code

Schema Changelog

Changes observed during successful MCP inspections.

First observedv1.0.3Jul 28, 2026

TDQS

B3.3/5.0

Behavior2/5

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

No annotations are present, so the description carries the full burden. It only states the tool 'scans multiple departure dates' but does not disclose behavior such as whether it returns prices, dates only, or real-time vs. cached data. Lacks transparency for an agent to predict side effects or limitations.

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?

Two sentences, immediately stating the core function. No wasted words, front-loaded with actionable information.

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

Completeness2/5

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

Tool has 6 parameters, no output schema, and no annotations. The description fails to specify return format (e.g., prices, dates, or both), how scanning works, or any prerequisite knowledge. Incomplete for an agent to use effectively without additional context.

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

Parameters2/5

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

Schema description coverage is 67%, with adults and cabinClass lacking descriptions. The tool description does not add any parameter-specific details beyond what the schema already provides. No compensation for missing parameter descriptions.

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's purpose: 'Find the cheapest travel dates for a route within a date range.' It uses a specific verb ('Find') and resource ('cheapest travel dates'), and distinguishes itself from sibling tools like search_flights by indicating it scans multiple departure dates.

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?

The description implies usage for finding cheapest dates across a range, but lacks explicit guidance on when not to use it (e.g., for specific flight booking) or alternatives like search_flights or get_calendar_heatmap. No exclusion criteria or context provided.

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

Deploy Server