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Rank rows by a numeric column

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

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
limitNo
columnYes
ascendingNotrue for the lowest first; default highest first

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observed

TDQS

C2.9/5.0
Behavior2/5

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

No annotations are provided, so the description carries the full behavioral burden. It conveys only ordering direction and adds nothing about return shape, tie-breaking, defaults, what happens when the requested column is non-numeric, or permission/rate considerations — a significant gap for a query tool with zero annotation coverage.

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?

A single front-loaded sentence with the resource and scope stated first and zero filler. The trailing example phrasing is compact and useful, so little is wasted.

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?

With no annotations, no output schema, three parameters at 33% description coverage, and no stated defaults beyond a one-word schema hint, the description is too thin for an agent to call this confidently. It should at least cover limit behavior and what is returned.

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 only 33% (just the ascending flag). The description adds that the column must be numeric and implies the highest/lowest semantics, which partially maps to 'column' and 'ascending', but it says nothing about 'limit' — its range, default, or cap of 50 — leaving a third parameter undocumented in both places.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

States a clear operation (return the highest/lowest rows) on a named resource (the Stocktaka dataset) scoped to a numeric column. An agent can distinguish this ranking tool from siblings like dataset_stats or dataset_rows, though the description never names an alternative explicitly.

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 quoted user-phrasing “which is the most/least X” implicitly signals the intended use case (superlative/ranking questions), which is better than nothing. However, it gives no guidance on when to prefer this over dataset_stats or dataset_search, and states no prerequisites or exclusions.

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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