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local_describe_image

Read-only

Describe an image or answer a specific question about it with a local vision model. The image is read server-side, so only the text response enters your context.

Instructions

PREFIERE esta tool en vez de adjuntar o leer la imagen tú mismo cuando solo necesitas una descripción, lectura de texto visible (OCR simple) o una respuesta puntual sobre una imagen, no la imagen en sí en tu contexto.

Describe una imagen (o responde una pregunta sobre ella) con un modelo local de visión.
La imagen se lee del lado del servidor: NUNCA entra al contexto de Claude, solo vuelve la
respuesta en texto.

Guardrail de alcance: SOLO imagen->texto (describir, leer texto visible, responder una
pregunta puntual sobre la imagen). Esta tool NUNCA genera ni edita imágenes.

Args:
    path: Ruta a la imagen (png/jpg/jpeg/webp/gif), leída server-side.
    question: Pregunta o foco concreto sobre la imagen (opcional; por defecto la describe).
    max_words: Longitud máxima de la respuesta en palabras.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
pathYes
questionNo
max_wordsNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior4/5

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

Annotations already declare readOnlyHint=true. Description adds that image is read server-side, never enters Claude's context, and uses a local vision model – valuable behavioral context beyond annotations.

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?

Well-structured: usage guidance first, then tool summary, guardrail, and parameter list. Every sentence adds value; no redundancy.

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?

Covers purpose, usage, parameters, and privacy. Could mention file size limits or error handling, but given annotations and output schema, it is sufficiently complete.

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

Parameters4/5

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

Schema coverage is 0%, so description fully compensates by listing path (with supported formats), question (optional, default behavior), and max_words (max length). Provides useful semantics beyond schema titles.

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 describes an image or answers a question, using the verb 'describe' and 'respuesta'. It specifies image-to-text only and is distinct from sibling text-based tools.

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

Usage Guidelines4/5

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

Explicitly tells when to prefer this tool over attaching the image, and guardrail clarifies it never generates images. Does not explicitly name alternatives but context implies them.

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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