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midjourney_with_reference

Use a reference image to generate modified versions. Describe changes to style, elements, or composition, and control reference influence with --iw parameter.

Instructions

Generate images using a reference image as inspiration.

This allows you to use an existing image as a starting point and modify it
based on your prompt description.

Use this when:
- You want to reimagine an existing image with modifications
- You want to change the style of an image
- You want to add or change elements while keeping the composition

Tips:
- Use --iw parameter (image weight) to control reference influence (0-2)
- Higher --iw values make the output more similar to the reference

Returns:
    Task ID and generated image information.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
reference_image_urlYesURL of the reference image to use as a base. Must be a direct image URL (not a web page).
promptYesDescription of how to modify or reimagine the reference image. Examples: 'an illustration of a car parked on the beach --iw 2', 'in the style of Van Gogh'
modeNoGeneration mode.fast

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 full burden. It explains the tool uses a reference image and modifies based on prompt, mentions the --iw parameter, and states it returns a Task ID and image info. Missing: behavior on invalid URLs, rate limits, or cost differences. Still good overall.

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?

The description is concise with clear sections: main action, usage scenarios, tips. Every sentence adds value. No redundant or verbose phrasing.

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 tool has 3 parameters, no nested objects, and an output schema (implied), the description is sufficient. It covers usage, returns, and tips. Could elaborate on output fields, but output schema exists to fill that gap.

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 100%, but the description adds value beyond schema by explaining how to use --iw for control and providing example prompts. This contextualizes the prompt parameter more richly than the schema description alone.

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 generates images using a reference image as inspiration. The verb 'generate' and the resource 'reference image' are specific, and it contrasts with sibling tools like 'midjourney_imagine' which does not use a reference.

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?

The description lists explicit use cases ('when you want to reimagine, change style, add/change elements'). However, it does not explicitly state when NOT to use this tool (e.g., for generation without reference). This is a minor gap.

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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