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FluxMCP

PyPI version PyPI downloads CI License: MIT MCP Python 3.10+

A Model Context Protocol (MCP) server for AI image generation and editing using Flux through the AceDataCloud platform.

Generate and edit stunning AI images with Flux models (flux-dev, flux-pro, flux-kontext) directly from Claude, Cursor, or any MCP-compatible client.

Features

  • Image Generation - Generate images from text prompts with 6 Flux models

  • Image Editing - Edit existing images with context-aware Flux Kontext models

  • Task Management - Track async generation tasks and batch status queries

  • Model Guide - Built-in model selection and prompt writing guidance

  • Dual Transport - stdio (local) and HTTP (remote/cloud) modes

  • Docker Ready - Containerized with K8s deployment manifests

  • Secure - Bearer token auth with per-request isolation in HTTP mode

Related MCP server: DiffuGen

Tool Reference

Tool

Description

flux_generate_image

Generate AI images from a text prompt using Flux.

flux_edit_image

Edit an existing image using Flux with a text prompt.

flux_list_models

List all available Flux models and their capabilities.

flux_list_actions

List all available Flux tools and their use cases.

flux_get_task

Query the status and result of a Flux image generation task.

flux_get_tasks_batch

Query multiple Flux image generation tasks at once.

Quick Start

1. Get Your API Token

  1. Sign up at AceDataCloud Platform

  2. Go to the API documentation page

  3. Click "Acquire" to get your API token

  4. Copy the token for use below

AceDataCloud hosts a managed MCP server — no local installation required.

Endpoint: https://flux.mcp.acedata.cloud/mcp

All requests require a Bearer token. Use the API token from Step 1.

Claude.ai

Connect directly on Claude.ai with OAuth — no API token needed:

  1. Go to Claude.ai Settings → Integrations → Add More

  2. Enter the server URL: https://flux.mcp.acedata.cloud/mcp

  3. Complete the OAuth login flow

  4. Start using the tools in your conversation

Claude Desktop

Add to your config (~/Library/Application Support/Claude/claude_desktop_config.json on macOS):

{
  "mcpServers": {
    "flux": {
      "type": "streamable-http",
      "url": "https://flux.mcp.acedata.cloud/mcp",
      "headers": {
        "Authorization": "Bearer YOUR_API_TOKEN"
      }
    }
  }
}

Cursor / Windsurf

Add to your MCP config (.cursor/mcp.json or .windsurf/mcp.json):

{
  "mcpServers": {
    "flux": {
      "type": "streamable-http",
      "url": "https://flux.mcp.acedata.cloud/mcp",
      "headers": {
        "Authorization": "Bearer YOUR_API_TOKEN"
      }
    }
  }
}

VS Code (Copilot)

Add to your VS Code MCP config (.vscode/mcp.json):

{
  "servers": {
    "flux": {
      "type": "streamable-http",
      "url": "https://flux.mcp.acedata.cloud/mcp",
      "headers": {
        "Authorization": "Bearer YOUR_API_TOKEN"
      }
    }
  }
}

Or install the Ace Data Cloud MCP extension for VS Code, which registers the hosted MCP servers with one-click setup.

JetBrains IDEs

  1. Go to Settings → Tools → AI Assistant → Model Context Protocol (MCP)

  2. Click AddHTTP

  3. Paste:

{
  "mcpServers": {
    "flux": {
      "url": "https://flux.mcp.acedata.cloud/mcp",
      "headers": {
        "Authorization": "Bearer YOUR_API_TOKEN"
      }
    }
  }
}

Claude Code

Claude Code supports MCP servers natively:

claude mcp add flux --transport http https://flux.mcp.acedata.cloud/mcp \
  -h "Authorization: Bearer YOUR_API_TOKEN"

Or add to your project's .mcp.json:

{
  "mcpServers": {
    "flux": {
      "type": "streamable-http",
      "url": "https://flux.mcp.acedata.cloud/mcp",
      "headers": {
        "Authorization": "Bearer YOUR_API_TOKEN"
      }
    }
  }
}

Cline

Add to Cline's MCP settings (.cline/mcp_settings.json):

{
  "mcpServers": {
    "flux": {
      "type": "streamable-http",
      "url": "https://flux.mcp.acedata.cloud/mcp",
      "headers": {
        "Authorization": "Bearer YOUR_API_TOKEN"
      }
    }
  }
}

Amazon Q Developer

Add to your MCP configuration:

{
  "mcpServers": {
    "flux": {
      "type": "streamable-http",
      "url": "https://flux.mcp.acedata.cloud/mcp",
      "headers": {
        "Authorization": "Bearer YOUR_API_TOKEN"
      }
    }
  }
}

Roo Code

Add to Roo Code MCP settings:

{
  "mcpServers": {
    "flux": {
      "type": "streamable-http",
      "url": "https://flux.mcp.acedata.cloud/mcp",
      "headers": {
        "Authorization": "Bearer YOUR_API_TOKEN"
      }
    }
  }
}

Continue.dev

Add to .continue/config.yaml:

mcpServers:
  - name: flux
    type: streamable-http
    url: https://flux.mcp.acedata.cloud/mcp
    headers:
      Authorization: "Bearer YOUR_API_TOKEN"

Zed

Add to Zed's settings (~/.config/zed/settings.json):

{
  "language_models": {
    "mcp_servers": {
      "flux": {
        "url": "https://flux.mcp.acedata.cloud/mcp",
        "headers": {
          "Authorization": "Bearer YOUR_API_TOKEN"
        }
      }
    }
  }
}

cURL Test

# Health check (no auth required)
curl https://flux.mcp.acedata.cloud/health

# MCP initialize
curl -X POST https://flux.mcp.acedata.cloud/mcp \
  -H "Content-Type: application/json" \
  -H "Accept: application/json" \
  -H "Authorization: Bearer YOUR_API_TOKEN" \
  -d '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2025-03-26","capabilities":{},"clientInfo":{"name":"test","version":"1.0"}}}'

3. Or Run Locally (Alternative)

If you prefer to run the server on your own machine:

# Install from PyPI
pip install mcp-flux-pro
# or
uvx mcp-flux-pro

# Set your API token
export ACEDATACLOUD_API_TOKEN="your_token_here"

# Run (stdio mode for Claude Desktop / local clients)
mcp-flux-pro

# Run (HTTP mode for remote access)
mcp-flux-pro --transport http --port 8000

Claude Desktop (Local)

{
  "mcpServers": {
    "flux": {
      "command": "uvx",
      "args": ["mcp-flux-pro"],
      "env": {
        "ACEDATACLOUD_API_TOKEN": "your_token_here"
      }
    }
  }
}

Docker (Self-Hosting)

docker pull ghcr.io/acedatacloud/mcp-flux-pro:latest
docker run -p 8000:8000 ghcr.io/acedatacloud/mcp-flux-pro:latest

Clients connect with their own Bearer token — the server extracts the token from each request's Authorization header.

Available Tools

Tool

Description

flux_generate_image

Generate images from text prompts with model selection

flux_edit_image

Edit existing images with text instructions

flux_get_task

Query status of a single generation task

flux_get_tasks_batch

Query multiple task statuses at once

flux_list_models

List all available Flux models and capabilities

flux_list_actions

Show all tools and workflow examples

Available Prompts

Prompt

Description

flux_image_generation_guide

Guide for choosing the right tool and model

flux_prompt_writing_guide

Best practices for writing effective prompts

flux_workflow_examples

Common workflow patterns and examples

Supported Models

Model

Quality

Speed

Size Format

Best For

flux-dev

Good

Fast

Pixels (256-1440px)

Quick prototyping

flux-pro

High

Medium

Pixels (256-1440px)

Production use

flux-kontext-pro

High

Medium

Aspect ratios

Image editing

flux-kontext-max

Highest

Slower

Aspect ratios

Complex editing

flux-2-flex

High

Fast

Aspect ratios

Flux 2 balanced quality

flux-2-pro

Higher

Medium

Aspect ratios

Flux 2 production

flux-2-max

Highest

Slower

Aspect ratios

Flux 2 maximum quality

flux-2-klein

Good

Fast

Aspect ratios

Flux 2 efficient output

Usage Examples

Generate an Image

"Generate a photorealistic mountain landscape at golden hour"
→ flux_generate_image(prompt="...", model="flux-2-max", size="16:9")

Edit an Image

"Add sunglasses to the person in this photo"
→ flux_edit_image(prompt="Add sunglasses", image_url="https://...", size="1:1", model="flux-kontext-pro")

Check Task Status

"What's the status of my generation?"
→ flux_get_task(task_id="...")

Environment Variables

Variable

Required

Default

Description

ACEDATACLOUD_API_TOKEN

Yes (stdio)

API token from AceDataCloud

ACEDATACLOUD_API_BASE_URL

No

https://api.acedata.cloud

API base URL

ACEDATACLOUD_OAUTH_CLIENT_ID

No

OAuth client ID (hosted mode)

ACEDATACLOUD_PLATFORM_BASE_URL

No

https://platform.acedata.cloud

Platform base URL

FLUX_REQUEST_TIMEOUT

No

1800

Request timeout in seconds

MCP_SERVER_NAME

No

flux

MCP server name

LOG_LEVEL

No

INFO

Logging level

Development

Setup

git clone https://github.com/AceDataCloud/FluxMCP.git
cd FluxMCP
pip install -e ".[all]"
cp .env.example .env
# Edit .env with your API token

Lint & Format

ruff check .
ruff format .
mypy core tools main.py

Test

# Unit tests
pytest --cov=core --cov=tools

# Skip integration tests
pytest -m "not integration"

# With coverage report
pytest --cov=core --cov=tools --cov-report=html

Git Hooks

git config core.hooksPath .githooks

API Reference

This MCP server uses the AceDataCloud Flux API:

  • POST /flux/images — Generate or edit images

  • POST /flux/tasks — Query task status (single or batch)

Full API documentation: platform.acedata.cloud

Documentation

Documentation

License

MIT License — see LICENSE for details.

Available Tools

6 tools
flux_edit_imageAInspect

Edit an existing image using Flux with a text prompt.

This allows you to modify an existing image based on a text description.
The kontext models (flux-kontext-pro, flux-kontext-max) are specifically
designed for high-quality image editing and style transfer.

Use this when:
- You want to modify or transform an existing image
- You want to change specific elements in an image
- You want to apply style changes or artistic effects
- You want to add, remove, or replace objects in an image

For generating new images from scratch, use flux_generate_image instead.

Returns:
    Task ID and edited image information including URLs.
ParametersJSON Schema
NameRequiredDescriptionDefault
sizeYesRequired output image size. For kontext models: aspect ratios like '1:1', '16:9'. For other models: pixel dimensions like '1024x1024'.
modelNoFlux model to use for editing. Recommended models for editing: - flux-kontext-pro: Best for context-aware editing and style transfer (recommended) - flux-kontext-max: Maximum context for complex edits - flux-dev: Basic editing support Other models also support editing but kontext models give best results.flux-kontext-pro
promptYesDescription of how to edit the image. Be specific about what changes to make. Examples: 'Change the background to a sunset beach', 'Add sunglasses to the person', 'Make it look like a watercolor painting', 'Replace the car with a bicycle'
image_urlYesURL of the image to edit. Must be a direct image URL (JPEG, PNG, etc.), not a web page containing an image.
callback_urlNoWebhook callback URL for asynchronous notifications.

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

A4.3/5.0
Behavior3/5

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

No annotations are provided, so the description carries the full burden. It explains the edit operation and mentions kontext model specifics but doesn't disclose async behavior (callback_url suggests it), rate limits, or auth requirements. Adequate but not rich.

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?

Well-structured with clear sections, front-loaded purpose, and a concise returns line. Slightly long but every sentence adds value for usage guidance.

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, alternatives, and parameter guidance. The output schema exists and the return statement is brief; however, missing behavioral details (async, callback semantics) and no explicit when-not-to-use beyond generation, but sufficient for a complex multi-model tool.

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% with descriptions for all parameters. The description adds value by elaborating on recommended models and giving prompt examples beyond the schema, though not deeply for other params.

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 states 'Edit an existing image using Flux with a text prompt' with specific verbs and resource. It clearly distinguishes from flux_generate_image by explicitly noting the sibling for generation.

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

Usage Guidelines5/5

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

Provides explicit 'Use this when' list with four concrete scenarios and names the alternative tool (flux_generate_image) for when not to use it.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

flux_generate_imageAInspect

Generate AI images from a text prompt using Flux.

Flux is a family of fast, high-quality image generation models by Black Forest Labs.
Different models offer different tradeoffs between speed, quality, and capabilities.

Use this when:
- You want to create new images from a text description
- You need high-quality AI-generated artwork or photos
- You want fast image generation with good prompt following

For editing existing images, use flux_edit_image instead.

Returns:
    Task ID and generated image information including URLs.
ParametersJSON Schema
NameRequiredDescriptionDefault
sizeYesRequired image size. For flux-dev: pixel dimensions like '1024x1024' (256-1440px, multiples of 32). For flux-2-flex/pro/max: pixel dimensions (x >= 64, multiples of 32). For kontext models: image ratios like '1:1', '16:9', '9:16', '4:3', '3:2', '2:3', '4:5', '5:4', '3:4', '21:9', '9:21'.
countNoNumber of images to generate. Only supported for generate action. Default is 1.
modelNoFlux model to use for generation. Options: - flux-dev: Fast development model, good balance of speed and quality (default) - flux-pro: Higher quality production model - flux-2-flex: Flux 2 flexible model, pixel sizes (x >= 64, multiple of 32) - flux-2-pro: Flux 2 professional model, high quality - flux-2-max: Flux 2 maximum-quality model - flux-2-klein: Flux 2 klein model, efficient generation - flux-kontext-pro: Context-aware model for editing and style transfer - flux-kontext-max: Maximum context model for complex editing tasksflux-dev
promptYesDescription of the image to generate. Be descriptive about style, subject, lighting, and composition. Examples: 'A majestic mountain landscape at golden hour, photorealistic', 'Cyberpunk street scene with neon lights and rain, cinematic', 'Minimalist logo design of a phoenix, vector art style'
callback_urlNoWebhook callback URL for asynchronous notifications. When provided, the API will POST to this URL when the image is generated.

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

A4.1/5.0
Behavior3/5

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

No annotations are provided, so the description carries the full transparency burden. It mentions returning a 'Task ID and generated image information including URLs,' which hints at async/task-based behavior. However, it does not explain whether generation is synchronous, how long it may take, whether it should be polled via flux_get_task, or side effects such as cost/rate limits. Some insight is given, but it is not comprehensive.

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 structure is effective: a one-sentence purpose, brief context, use-case bullets, a sibling-tool contrast, and a returns section. It is slightly wordier than necessary—some model-family background could be trimmed—but every section earns its place.

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 5-parameter image-generation tool, the description provides enough high-level context: generation purpose, model family tradeoff, use cases, editing alternative, and output type. It does not explicitly mention how to monitor task progress or poll until successful generation, but the 'Task ID' return value and the presence of flux_get_task make a workable inference.

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 description coverage is 100%, so the baseline is 3. The description refers to prompts and mentions high-quality generation, but does not add substantial meaning beyond the schema's parameter descriptions. The schema already documents model recommendations, size formats, count/defaults, and callback_url semantics.

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 opens with a specific verb and resource: 'Generate AI images from a text prompt using Flux.' It clearly distinguishes this tool from flux_edit_image by explicitly stating that editing existing images should use the sibling tool.

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

Usage Guidelines5/5

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

The 'Use this when' section lists three concrete scenarios for new image generation, and explicitly states that editing existing images should use flux_edit_image instead. This provides clear when-to-use and when-not-to-use guidance.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

flux_get_taskAInspect

Query the status and result of a Flux image generation task.

Use this to check if a generation is complete and retrieve the resulting
image URLs and metadata.

Use this when:
- You want to check if an image generation has completed
- You need to retrieve image URLs from a previous generation
- You used async callback and want to check results later
- The initial generation returned a task_id without immediate results

Returns:
    Task status and generation result including image URLs.
ParametersJSON Schema
NameRequiredDescriptionDefault
task_idYesThe task ID returned from a generation or edit request. This is the 'task_id' field from any flux_generate_image or flux_edit_image tool response.

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

A4.1/5.0
Behavior3/5

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

No annotations are provided, so the description carries full burden. It correctly indicates this is a read-only query with no destructive effects, and mentions return content (image URLs and metadata). However, it does not disclose any rate limits, caching behavior, or error conditions, which are helpful for a polling 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?

The description is well-structured with a clear initial sentence, a bullet list of use cases, and a returns summary. It is concise without being terse, with no redundant information. Minor improvement could be removing the 'Returns:' line if output schema covers it, but still efficient.

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 one simple parameter and an output schema (context confirms its existence), the description covers the essential purpose and usage context. It explains when to use and what to expect, making it complete for an agent to understand when and how to invoke it.

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% with only one parameter (task_id). The schema description is already rich, specifying it comes from generation or edit tools. The description adds context by linking task_id to async workflows. This combination provides sufficient semantic clarity beyond the schema 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 'Query the status and result of a Flux image generation task,' providing a specific verb and resource. It differentiates from sibling tools like flux_get_tasks_batch by focusing on a single task, and from generation tools by being a query operation.

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 includes a 'Use this when' section listing four specific scenarios (check completion, retrieve URLs, async callback, delayed results). While it does not explicitly mention when not to use or alternatives like flux_get_tasks_batch, the guidance is clear and actionable.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

flux_get_tasks_batchAInspect

Query multiple Flux image generation tasks at once.

Efficiently check the status of multiple tasks in a single request.
More efficient than calling flux_get_task multiple times.

Use this when:
- You have multiple pending generations to check
- You want to get status of several images at once
- You're tracking a batch of generations

Returns:
    Status and result information for all queried tasks.
ParametersJSON Schema
NameRequiredDescriptionDefault
task_idsYesList of task IDs to query. Maximum recommended batch size is 50 tasks.

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

A4/5.0
Behavior3/5

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

No annotations provided, so description carries burden. It states 'Efficiently check status' and 'returns status and result information', but does not disclose rate limits, authentication needs, or error behavior—adequate but minimal.

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?

Description is concise, front-loaded with purpose, and uses bullet points for clarity—every sentence adds value without 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?

With output schema present and simple tool, description covers usage and return basics. Lacks details on invalid IDs or error handling, but still fairly complete.

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 has 1 parameter with description including max batch size (100% coverage). Description adds context on efficiency and use cases but does not add new parameter meaning, meeting baseline 3.

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 'Query multiple Flux image generation tasks at once' with a specific verb and resource, and it distinguishes itself from the sibling flux_get_task by highlighting batch efficiency.

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?

Provides explicit when-to-use scenarios (multiple pending generations, batch tracking) and mentions efficiency over multiple calls, but lacks when-not-to-use or alternatives beyond the sibling.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

flux_list_actionsAInspect

List all available Flux tools and their use cases.

Reference guide for what each tool does and when to use it.

Returns:
    Categorized list of all tools with descriptions.
ParametersJSON Schema
NameRequiredDescriptionDefault

No parameters

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

A4.3/5.0
Behavior3/5

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

No annotations are provided, so the description bears the full burden. It states the return type ('categorized list of all tools with descriptions') but doesn't disclose behavioral traits like no side effects, idempotency, or performance characteristics. For a list operation, this is adequate but not exemplary.

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?

Three sentences, no waste. The first sentence immediately states the core purpose, the second explains its role, and the third describes the return. Front-loaded and efficient.

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

Completeness5/5

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

Given no parameters and the presence of an output schema, the description sufficiently explains what the tool does and what it returns. It is complete for a simple listing tool.

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?

The input schema has zero parameters, and the description adds value by confirming that it lists 'all' available tools, implying no filtering options. With 100% schema coverage, the description reinforces the simplicity.

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 'List all available Flux tools and their use cases,' which is a specific verb-resource combination. It distinguishes from sibling tools like flux_generate_image and flux_list_models, which have different purposes.

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 frames it as a 'reference guide for what each tool does and when to use it,' implying it should be used to understand other tools. While it doesn't explicitly state when not to use it, the sibling context makes its utility clear.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

flux_list_modelsAInspect

List all available Flux models and their capabilities.

Reference guide for choosing the right Flux model for your use case.

Returns:
    Detailed list of all Flux models with descriptions and recommendations.
ParametersJSON Schema
NameRequiredDescriptionDefault

No parameters

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

A4.1/5.0
Behavior4/5

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

With no annotations provided, the description fully bears the burden of disclosure. It adequately describes the behavior: listing models with capabilities and recommendations, implying a read-only, non-destructive operation.

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 with three short sentences covering what, why, and return. It is front-loaded with the primary action and adds value without verbosity.

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 no parameters and an output schema, the description is fairly complete. It explains the purpose, return value, and use case, though it could explicitly state it is read-only.

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?

There are no parameters, and schema coverage is 100%. The description adds context by stating the return content (detailed list with descriptions and recommendations), which is not in the 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 that the tool lists all available Flux models and their capabilities, with a specific verb (List) and resource (Flux models). This distinguishes it from sibling tools that edit, generate, or retrieve tasks.

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?

The description mentions it is a 'Reference guide for choosing the right Flux model for your use case,' implying usage before model-dependent operations, but it does not explicitly exclude other uses or mention alternative tools.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections. Dates show when Glama detected each change.

  1. 2 tool updatesv0.1.9
    • Changedflux_edit_image5 fields changed
      • removedInput schema / properties / size / anyOf
        Removed value: -[
        -  {
        -    "type": "string"
        -  },
        -  {
        -    "type": "null"
        -  }
        -]
      • removedInput schema / properties / size / default
        Removed value: -null
      • changedInput schema / properties / size / description
        Previous value: -"Output image size. For kontext models: aspect ratios like '1:1', '16:9'. For other models: pixel dimensions like '1024x1024'."New value: +"Required output image size. For kontext models: aspect ratios like '1:1', '16:9'. For other models: pixel dimensions like '1024x1024'."
      • addedInput schema / properties / size / type
        Added value: +"string"
      • changedInput schema / required
        Previous value: -[
        -  "prompt",
        -  "image_url"
        -]New value: +[
        +  "prompt",
        +  "image_url",
        +  "size"
        +]
    • Changedflux_generate_image5 fields changed
      • removedInput schema / properties / size / anyOf
        Removed value: -[
        -  {
        -    "type": "string"
        -  },
        -  {
        -    "type": "null"
        -  }
        -]
      • removedInput schema / properties / size / default
        Removed value: -null
      • changedInput schema / properties / size / description
        Previous value: -"Image size. For flux-dev: pixel dimensions like '1024x1024' (256-1440px, multiples of 32). For flux-2-flex/pro/max: pixel dimensions (x >= 64, multiples of 32). For kontext models: image ratios like '1:1', '16:9', '9:16', '4:3', '3:2', '2:3', '4:5', '5:4', '3:4', '21:9', '9:21'. Default varies by model."New value: +"Required image size. For flux-dev: pixel dimensions like '1024x1024' (256-1440px, multiples of 32). For flux-2-flex/pro/max: pixel dimensions (x >= 64, multiples of 32). For kontext models: image ratios like '1:1', '16:9', '9:16', '4:3', '3:2', '2:3', '4:5', '5:4', '3:4', '21:9', '9:21'."
      • addedInput schema / properties / size / type
        Added value: +"string"
      • changedInput schema / required
        Previous value: -[
        -  "prompt"
        -]New value: +[
        +  "prompt",
        +  "size"
        +]
  2. 2 tool updatesv0.1.7
    • Changedflux_edit_image1 field changed
      • changedInput schema / properties / model / enum
        Previous value: -[
        -  "flux-dev",
        -  "flux-pro",
        -  "flux-kontext-pro",
        -  "flux-kontext-max",
        -  "flux-2-flex",
        -  "flux-2-pro",
        -  "flux-2-max"
        -]New value: +[
        +  "flux-dev",
        +  "flux-pro",
        +  "flux-kontext-pro",
        +  "flux-kontext-max",
        +  "flux-2-flex",
        +  "flux-2-pro",
        +  "flux-2-max",
        +  "flux-2-klein"
        +]
    • Changedflux_generate_image2 fields changed
      • changedInput schema / properties / model / description
        Previous value: -"Flux model to use for generation. Options:\n- flux-dev: Fast development model, good balance of speed and quality (default)\n- flux-pro: Higher quality production model\n- flux-2-flex: Flux 2 flexible model, pixel sizes (x >= 64, multiple of 32)\n- flux-2-pro: Flux 2 professional model, high quality\n- flux-2-max: Flux 2 maximum-quality model\n- flux-kontext-pro: Context-aware model for editing and style transfer\n- flux-kontext-max: Maximum context model for complex editing tasks"New value: +"Flux model to use for generation. Options:\n- flux-dev: Fast development model, good balance of speed and quality (default)\n- flux-pro: Higher quality production model\n- flux-2-flex: Flux 2 flexible model, pixel sizes (x >= 64, multiple of 32)\n- flux-2-pro: Flux 2 professional model, high quality\n- flux-2-max: Flux 2 maximum-quality model\n- flux-2-klein: Flux 2 klein model, efficient generation\n- flux-kontext-pro: Context-aware model for editing and style transfer\n- flux-kontext-max: Maximum context model for complex editing tasks"
      • changedInput schema / properties / model / enum
        Previous value: -[
        -  "flux-dev",
        -  "flux-pro",
        -  "flux-kontext-pro",
        -  "flux-kontext-max",
        -  "flux-2-flex",
        -  "flux-2-pro",
        -  "flux-2-max"
        -]New value: +[
        +  "flux-dev",
        +  "flux-pro",
        +  "flux-kontext-pro",
        +  "flux-kontext-max",
        +  "flux-2-flex",
        +  "flux-2-pro",
        +  "flux-2-max",
        +  "flux-2-klein"
        +]
  3. 1 tool updatev0.1.6
    • Changedflux_generate_image2 fields changed
      • changedInput schema / properties / model / description
        Previous value: -"Flux model to use for generation. Options:\n- flux-dev: Fast development model, good balance of speed and quality (default)\n- flux-pro: Higher quality production model\n- flux-pro-1.1: Improved production model with better prompt following\n- flux-pro-1.1-ultra: Highest quality, supports aspect ratios instead of pixel sizes\n- flux-kontext-pro: Context-aware model for editing and style transfer\n- flux-kontext-max: Maximum context model for complex editing tasks"New value: +"Flux model to use for generation. Options:\n- flux-dev: Fast development model, good balance of speed and quality (default)\n- flux-pro: Higher quality production model\n- flux-2-flex: Flux 2 flexible model, pixel sizes (x >= 64, multiple of 32)\n- flux-2-pro: Flux 2 professional model, high quality\n- flux-2-max: Flux 2 maximum-quality model\n- flux-kontext-pro: Context-aware model for editing and style transfer\n- flux-kontext-max: Maximum context model for complex editing tasks"
      • changedInput schema / properties / size / description
        Previous value: -"Image size. For flux-dev/pro/pro-1.1: pixel dimensions like '1024x1024' (256-1440px, multiples of 32). For flux-pro-1.1-ultra and kontext models: aspect ratios like '1:1', '16:9', '9:16', '4:3', '3:2', '2:3', '4:5', '5:4', '3:4', '21:9', '9:21'. Default varies by model."New value: +"Image size. For flux-dev: pixel dimensions like '1024x1024' (256-1440px, multiples of 32). For flux-2-flex/pro/max: pixel dimensions (x >= 64, multiples of 32). For kontext models: image ratios like '1:1', '16:9', '9:16', '4:3', '3:2', '2:3', '4:5', '5:4', '3:4', '21:9', '9:21'. Default varies by model."
  4. 6 tool updatesv0.1.3
    • Addedflux_edit_image
    • Addedflux_generate_image
    • Addedflux_get_task
    • Addedflux_get_tasks_batch
    • Addedflux_list_actions
    • Addedflux_list_models
  5. 6 tool updatesv0.1.2
    • Removedflux_edit_image
    • Removedflux_generate_image
    • Removedflux_get_task
    • Removedflux_get_tasks_batch
    • Removedflux_list_actions
    • Removedflux_list_models
  6. 6 tool updatesv0.1.0
    • First observedflux_edit_image
    • First observedflux_generate_image
    • First observedflux_get_task
    • First observedflux_get_tasks_batch
    • First observedflux_list_actions
    • First observedflux_list_models

TDQS

A4.3/5.0
Disambiguation5/5

Each tool targets a distinct operation: generate vs edit, list models vs list tools, and single vs batch task queries. The cross-references in descriptions further reduce any chance of misselection.

Naming Consistency5/5

All tools follow the consistent pattern of `flux_` prefix plus verb_noun (generate_image, list_models, get_task, etc.). The naming style is uniform and predictable across the entire set.

Tool Count5/5

Six tools is well-scoped for an image generation and editing server, covering the core operations without unnecessary bloat. Each tool adds clear value to the workflow.

Completeness4/5

The core lifecycle of generating/editing images and retrieving results is well covered, along with model discovery. A minor gap is the lack of a task cancellation tool, but this is not essential for typical usage.

Maintenance

ActivityMaintained
ResponsivenessUnresponsive

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