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matias-denatale

eph-context

get_design_record

Obtain the official variable dictionary for EPH microdata files to ensure correct variable names and category codes, which change between periods.

Instructions

Returns the OFFICIAL variable dictionary for EPH microdata files.

Call eph_setup() first if you have not already. Call this BEFORE writing any code that references variable names or category codes. Do NOT use variable names from memory — they change between periods.

tipo values: "31_aglomerados_pre" — EPH 31 aglomerados urbanos, quarters BEFORE 4T2023 "31_aglomerados_post" — EPH 31 aglomerados urbanos, FROM 4T2023 onward (redesigned variables) "total_urbano_pre" — EPH Total Urbano, before 4T2023 "total_urbano_post" — EPH Total Urbano, from 4T2023 onward

If the user has not specified the period, ASK before calling this tool.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
tipoYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior4/5

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

No annotations are provided, so the description carries the full burden. It clearly indicates this is a retrieval operation (returns a dictionary) and states a prerequisite (eph_setup). However, it could more explicitly state that the tool is read-only and has no side effects, though the action of 'returning' implies no mutation.

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?

The description is logically structured: purpose first, then usage instructions, then parameter explanation, then conditional guidance. It is slightly lengthy but each sentence adds value, earning a high score.

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 the existence of an output schema and sibling tools, the description adequately covers its role and prerequisites. It lacks error handling details (e.g., invalid tipo), but the overall guidance is sufficient for effective tool selection and invocation.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters5/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 0% (parameter tipo has no description), but the description compensates fully by listing and explaining all valid values for tipo, including their temporal contexts. This adds critical meaning beyond the schema's mere string type.

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 returns the official variable dictionary for EPH microdata files, identifying its specific purpose and resource. It distinguishes from siblings by emphasizing its role as a dictionary to be used before referencing variable names.

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

Usage Guidelines5/5

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

The description provides explicit when-to-call instructions: call eph_setup() first if needed, call before writing code referencing variables, and advises not to use variable names from memory. It also explains the two main scenarios for tipo values and instructs to ask the user if the period is unspecified.

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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