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jpeg_quantization

Analyze JPEG quantization tables and estimate quality factor by comparing against standard luminance/chrominance tables for forensic analysis.

Instructions

Quantization table analysis with quality estimation. Displays all quantization tables in 8x8 grid format and estimates the JPEG quality factor by comparing against the standard luminance/chrominance tables — essential for forensic analysis.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
file_pathYesPath to JPEG file for quantization analysis
Behavior4/5

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

Describes output format (8x8 grid) and estimation of quality factor. No annotations provided, so description carries burden. Does not mention any side effects or limitations beyond the analysis scope, but is adequate for a read-only forensic tool.

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?

Single sentence conveying two key actions (display tables, estimate quality). Slightly verbose with 'essential for forensic analysis' but overall concise and front-loaded.

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?

For a simple tool with one parameter and no output schema, the description adequately explains what it does and the format of results. No missing critical information for an AI agent to invoke it correctly.

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 a single parameter (file_path) whose description is sufficient. The tool description does not add additional semantic meaning beyond the schema; baseline score of 3 applies.

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 performs quantization table analysis with quality estimation. Distinct from sibling JPEG tools like jpeg_structure or jpeg_dct_histogram by focusing on quantization tables and quality factor estimation.

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?

Mentions 'essential for forensic analysis' as context, but does not explicitly specify when to use over alternatives or when not to use. Lacks exclusion criteria or alternative tool references.

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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