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jdmiranda

DataBento MCP Server

by jdmiranda

metadata_get_dataset_range

Retrieve the start and end dates available for a dataset to verify its historical coverage.

Instructions

Get the available date range for a dataset

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
datasetYesDataset code (e.g., GLBX.MDP3)
Behavior2/5

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

With no annotations, the description carries full burden but only says 'Get the available date range'. It doesn't disclose what the return format is (e.g., start/end dates), whether authentication is needed, or any side effects. This is insufficient for a tool with no annotations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness3/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is short and to the point, but it is arguably under-specified. It conveys the core action without waste, but lacks structure or additional helpful sentences. It could benefit from mentioning the output.

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?

Given no output schema and no annotations, the description is incomplete. It doesn't explain what the function returns, which is critical for an agent. For a simple tool with one param, it should at least mention that it returns a date range with start and end dates.

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 input schema already describes the 'dataset' parameter fully (type, required, example). The description adds no additional meaning beyond what the schema provides, so baseline 3 is appropriate.

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 verb 'Get' and the resource 'available date range for a dataset', making the purpose unambiguous. It distinguishes from sibling tools like metadata_get_cost and metadata_list_datasets.

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 on when to use this tool versus alternatives. For instance, it doesn't mention that it's for checking date range before fetching data with timeseries_get_range. Lacks any context about 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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