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change_detect

Computes the difference of any spectral index between two dates and classifies the magnitude of change for environmental monitoring.

Instructions

General-purpose change detection: computes the difference of any spectral index between two dates and classifies the magnitude of change.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
index_nameYesName of the spectral index being compared (e.g. "NDVI", "NDWI")
index_afterYesIndex value for the later date
index_beforeYesIndex value for the earlier date
Behavior3/5

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

No annotations provided, so description must carry full burden. Mentions classification of magnitude beyond mere difference, but doesn't detail thresholds, output structure, or potential side effects.

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 conveying all essential information without filler. Highly efficient and front-loaded.

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

Completeness3/5

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

Adequate for a simple tool, but lacks detail on classification categories, typical use cases, or guidance relative to specific change tools. No output schema and no annotations increase information burden.

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 clear descriptions. Description adds context about date comparison and classification, but doesn't significantly enhance understanding beyond 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?

Clearly states it computes difference of any spectral index between two dates and classifies magnitude. Verb 'computes' and specific resource 'change detection of spectral indices' distinguish it from sibling tools like change_burn or change_vegetation.

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?

Implies broad applicability via 'general-purpose', but lacks explicit guidance on when to use this versus specific change tools, no conditions or exclusions mentioned.

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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