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ONSdigital

Statistics Query and Verification MCP

Official
by ONSdigital

get_publication_overview

Fetches publication metadata, sections, and linked data files from a URL. Use to obtain a structured overview of a statistical publication.

Instructions

Fetch publication metadata, sections, and linked data files.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
urlYes
Behavior3/5

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

With no annotations, the description carries the full burden of behavioral disclosure. It correctly implies a read-only operation via 'Fetch,' but does not disclose potential quirks like response size, pagination, or error behavior. The description is minimal but not misleading.

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, focused sentence with no filler or redundant information. Every word contributes to conveying what the tool does.

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?

The tool has no output schema and no annotations, so the description needs to clarify what the agent can expect. It identifies three components (metadata, sections, linked data files) but leaves details ambiguous—for instance, whether 'linked data files' returns actual content or references. The description is adequate for a simple overview tool but leaves gaps.

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?

The 'url' parameter has no schema description (0% coverage), so the tool description must compensate. It indirectly implies that 'url' refers to the publication URL, but it never explicitly states this. The meaning is inferable from the tool name and description, but the description adds little direct parameter guidance.

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 action ('Fetch') and the resource ('publication metadata, sections, and linked data files'). It distinguishes the tool from siblings like get_publication_text (which likely fetches full text) and get_data_file (which likely fetches a specific data file), making the purpose unambiguous.

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

Usage Guidelines2/5

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

No guidance is provided on when to use this tool versus alternatives. The description does not mention criteria such as 'when you need an overview' or suggest using get_publication_text for full text. Despite being a simple tool, it lacks any contextual pointers.

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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