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Server Details

Longtailo: the site's own MCP server — dataset; every answer cites the site.

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Status
Healthy
Uptime
100.0% over the last 24 hours
Last Tested
Transport
Streamable HTTP · MCP 2025-11-25
URL
ChatGPT
–
Claude
–

TDQS

A3.9/5.0

Scored across 7 tools

Disambiguation4/5

Each tool targets a distinct query mode—schema, provenance, exact match, search, comparison, stats, and top-N—so there is little real ambiguity. The main possible confusion is between dataset_row and dataset_compare, since both filter by column values, but the descriptions clarify that compare is for ordered multi-value lookups while row handles single exact-value matches.

Naming Consistency5/5

All tool names follow a consistent dataset_<noun> pattern with lowercase snake_case, making the family easy to recognize and predict. Though the names use nouns rather than verbs, the convention is uniform and clear.

Tool Count5/5

Seven tools is a well-scoped set for querying and analyzing a single dataset. Each tool covers a distinct data-access need without redundancy or unnecessary bloat.

Completeness4/5

The surface covers schema discovery, provenance, exact and fuzzy lookup, multi-value comparisons, numeric stats, and top/bottom selection, which is comprehensive for typical dataset questions. A minor gap is the lack of categorical frequency counts or a way to retrieve all rows without a filter, but agents can work around those by combining existing tools.

Available Tools

7 tools
dataset_columnsDataset columns and shapeAInspect

The columns, which of them are numeric, the row count and the provenance banner of the Longtailo dataset. Call this first to learn the schema.

Inputs: no named parameters.

dataset_compareCompare rows side by sideAInspect

The rows of the Longtailo dataset whose column is any of the given values, in the order given — for "X vs Y" questions.

Inputs: column (required), values (required).

dataset_provenanceWhere this data comes from, and how to cite itAInspect

The source, the date it was computed, the licence and the citation for the Longtailo dataset. Read this to attribute a figure correctly.

Inputs: no named parameters.

dataset_rowLook a row up by an exact keyBInspect

The rows of the Longtailo dataset where a column equals a value exactly (case-insensitive).

Inputs: value (required), column (required).

dataset_searchSearch the datasetAInspect

Rows of the Longtailo dataset whose cells contain the query (case-insensitive), up to 50.

Inputs: query (required), limit.

dataset_statsSummary statistics for a numeric columnAInspect

count, min, max, mean, median and sum of a numeric column of the Longtailo dataset (grouping commas and currency are handled; non-numeric rows are excluded and counted).

Inputs: column (required).

dataset_topRank rows by a numeric columnBInspect

The highest (or lowest) rows of the Longtailo dataset by a numeric column — "which is the most/least X".

Inputs: column (required), limit, ascending.

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections.

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