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viator-mcp

viator-mcp

by chrischall
OverviewSchemaSourceRelated ServersDiscussionsAdmin
TypeScript
Remote

vt_get_availability_schedule

Read-only

Get availability schedules and per-age-band pricing for a Viator product, covering seasons, start times, unavailable dates, and all product options.

Instructions

Get the availability schedule and pricing for a Viator product — seasons, days of week, start times, unavailable dates, and per-age-band pricing for every product option. NOTE: prices are in the SUPPLIER's currency (see the currency field); convert with vt_get_exchange_rates.

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": {
      "product_code": "<product_code>"
    },
    "name": "vt_get_availability_schedule"
  }
}

Input Schema

NameRequiredDescriptionDefault
viewNoResponse shape: "compact" (default) drops fields the response already carries elsewhere; "full" returns every field this server understands. compact strips image/avatar URLs from the response; "full" returns Viator's payload untouched. No field projection on this tool — every other field comes back as Viator sent it.
product_codeYesViator product code, e.g. 5010SYDNEY

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed1 schema field changedv2.0.0
    • changedInput schema / $schema
      Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"
  2. Changed1 schema field changedv1.2.1
    • addedInput schema / properties / view
      Added value: +{
+  "description": "Response shape: \"compact\" (default) drops fields the response already carries elsewhere; \"full\" returns every field this server understands. compact strips image/avatar URLs from the response; \"full\" returns Viator's payload untouched. No field projection on this tool — every other field comes back as Viator sent it.",
+  "enum": [
+    "compact",
+    "full"
+  ],
+  "type": "string"
+}
  3. First observedv1.0.5

TDQS

A4/5.0
Behavior4/5

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

Annotations already declare readOnlyHint and openWorldHint, covering the safety profile. The description adds non-obvious behavioral context by warning that prices are in the supplier's currency and pointing to the currency field and conversion tool, which an agent would not infer from annotations alone. No contradiction exists.

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?

The description is a single information-dense sentence with a short, targeted note for the currency caveat. It front-loads the resource and avoids repeating schema details, so every clause earns its place.

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?

For a read-only lookup with two well-documented parameters, the description conveys the key return dimensions, the currency caveat, and the conversion path. Since there is no output schema, this level of detail is sufficient for an agent to know what to expect and how to handle prices.

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%: both product_code and view already have detailed descriptions. The description restates some response-level concepts like per-age-band pricing but adds no new parameter-level meaning beyond what the schema provides, so the baseline score 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 uses a specific verb ('Get') and a specific resource ('availability schedule and pricing for a Viator product'), then names the concrete data dimensions returned: seasons, days of week, start times, unavailable dates, and per-age-band pricing. This clearly distinguishes the tool from sibling search/product/tag tools without requiring the agent to inspect schemas.

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 intended use is reasonably implied by the phrase 'availability schedule and pricing for a Viator product,' but there is no explicit when-to-use guidance or named alternative. The only cross-tool note directs the agent to vt_get_exchange_rates for currency conversion, which is useful but does not help choose this tool over siblings.

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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