Lettza: the site's own MCP server — dataset; every answer cites the site.
Scored across 7 tools
The tools mostly target distinct operations: schema, provenance, exact row lookup, substring search, value-set comparison, summary statistics, and top/bottom ranking. dataset_row, dataset_search, and dataset_compare overlap somewhat around retrieving rows by value, but their descriptions clarify exact-match vs. multi-value vs. substring use cases.
All tools use a consistent dataset_ prefix with lowercase snake_case, making the set predictable. Suffixes mix nouns and verbs (columns, compare, provenance, row, search, stats, top) but this is readable and consistent with dataset-oriented operations.
Seven tools is well-scoped for a read-only dataset query server. Each tool has a clear, non-redundant role: schema discovery, provenance, row lookup, search, comparison, statistics, and ranking.
The surface covers the core lifecycle for querying a static dataset: understanding schema, attributing provenance, retrieving rows, searching, comparing groups, summarizing numeric columns, and ranking values. Minor gaps exist around more complex filtering or aggregations, but typical dataset Q&A workflows are covered.
The columns, which of them are numeric, the row count and the provenance banner of the Lettza dataset. Call this first to learn the schema.
Inputs: no named parameters.
The rows of the Lettza dataset whose column is any of the given values, in the order given — for "X vs Y" questions.
Inputs: column (required), values (required).
The source, the date it was computed, the licence and the citation for the Lettza dataset. Read this to attribute a figure correctly.
Inputs: no named parameters.
The rows of the Lettza dataset where a column equals a value exactly (case-insensitive).
Inputs: value (required), column (required).
Rows of the Lettza dataset whose cells contain the query (case-insensitive), up to 50.
Inputs: query (required), limit.
count, min, max, mean, median and sum of a numeric column of the Lettza dataset (grouping commas and currency are handled; non-numeric rows are excluded and counted).
Inputs: column (required).
The highest (or lowest) rows of the Lettza dataset by a numeric column — "which is the most/least X".
Inputs: column (required), limit, ascending.
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
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Mandatzo: the site's own MCP server — dataset; every answer cites the site.
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Enpso: the site's own MCP server — dataset; every answer cites the site.
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