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alexrobl
by alexrobl

read_features

Read vector spatial features from files (GeoJSON, Shapefile, FileGDB, GeoPackage) with optional filters, returning as GeoJSON FeatureCollection.

Instructions

Lee features de una capa y los devuelve como GeoJSON FeatureCollection.

Args: path: Ruta al archivo o directorio espacial. layer: Nombre de la capa (None = primera capa). limit: Número máximo de features a retornar (default 10). where: Filtro SQL OGR, ej: "POBLACION > 5000 AND TIPO = 'urbano'". bbox: Filtro espacial [xmin, ymin, xmax, ymax] en el CRS de la capa.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
bboxNo
pathYes
layerNo
limitNo
whereNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior3/5

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

No annotations provided, so the description carries the burden. It describes the operation and parameters but lacks disclosure on performance, authentication, or side effects. The default limit is mentioned, which is helpful.

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 concise, starting with a clear summary followed by parameter details. No unnecessary content, though the 'Args:' format is slightly verbose.

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?

With 5 parameters and an output schema, the description covers all input details well. Missing hints on performance or usage limits, but overall adequate.

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?

Each parameter is explained with default values and examples (e.g., SQL filter format, bbox array). This adds significant meaning beyond the bare schema.

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 reads features from a layer and returns them as GeoJSON FeatureCollection. This distinguishes it from sibling tools like get_layer_schema or list_layers.

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 vs alternatives. It does not mention when-not or provide explicit context for choosing over siblings.

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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