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xaviviro

Opendata.cat MCP Server

by xaviviro

get_dataset_info

Retrieve complete metadata for any dataset, including field types, descriptions, API endpoint, and license information.

Instructions

Get complete metadata for a dataset: fields with types and descriptions, API endpoint, license.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
dataset_idYesUnique dataset identifier (e.g., 'generalitat:gn9e-3qhr', 'renfe:vehicle-positions-gtfsrt')
Behavior2/5

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

With no annotations, the description should disclose behavioral traits. It only states what it returns, not any side effects, auth requirements, or constraints. As a read operation, this is minimal transparency.

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?

Single sentence with no excess verbiage. Clearly structured listing included metadata components.

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

Completeness4/5

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

Given one parameter and no output schema, the description adequately lists return contents. Might be improved by noting error cases (e.g., invalid dataset_id), but sufficient for the tool's simplicity.

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?

Schema coverage is 100% with a clear description and examples for dataset_id. The description adds no extra parameter guidance beyond the schema, meeting the baseline.

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 it retrieves complete metadata for a dataset, listing specific components (fields, types, API endpoint, license). It distinguishes from siblings like list_dataset_fields which returns only fields.

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 description implies use when needing full metadata, but does not explicitly guide against alternative tools like list_dataset_fields or provide when-not conditions.

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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