Skip to main content
Glama
brynmrgn

ONS + Nomis MCP server

by brynmrgn

search_datasets

Find ONS and Nomis datasets by searching titles, descriptions, or keywords for topics like inflation or life expectancy. Retrieves matching dataset IDs.

Instructions

Find datasets whose title, description or keywords match query.

The beta API has no server-side search, so this pages through the catalogue and filters client-side on a case-insensitive substring. Good for turning a topic ("inflation", "life expectancy") into a dataset id.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
limitNo
queryYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Behavior5/5

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

With no annotations, the description fully discloses the beta API limitation, client-side paging, and case-insensitive substring matching, providing essential behavioral context.

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 concise with three front-loaded sentences, each adding value: purpose, limitation, and usage example.

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

Completeness3/5

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

While the output schema covers return values, the description omits the 'limit' parameter; given the simplicity of the tool, this is a minor gap but still leaves the tool's full interface undocumented.

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 coverage is 0%, but the description only explains the 'query' parameter; the 'limit' parameter is not mentioned, leaving its purpose unclear.

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 finds datasets matching a query by title, description, or keywords, and distinguishes it from siblings by mentioning the client-side limitation.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description gives a clear use case ('turning a topic into a dataset id') and explains the client-side filtering caveat, but does not explicitly mention when not to use or alternatives among the many sibling tools.

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

Install Server

Other Tools

Latest Blog Posts

MCP directory API

We provide all the information about MCP servers via our MCP API.

curl -X GET 'https://glama.ai/api/mcp/v1/servers/brynmrgn/ons-mcp'

If you have feedback or need assistance with the MCP directory API, please join our Discord server