Generate an image from a text prompt and optional reference images. Available ratios are 1920:1080, 1080:1920, 1024:1024, 1360:768, 1080:1080, 1168:880, 1440:1080, 1080:1440, 1808:768, 2112:912, 1280:720, 720:1280, 720:720, 960:720, 720:960, 1680:720. Use 1920:1080 by default. It also accepts ref...
AI agents use runway_generateImage to create or update resources in Runway API MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Runway API MCP Server environment.
This tool creates new digital assets (images) based on user input, which constitutes a Write operation. The severity is medium because: (1) generated images consume API resources and quota, (2) image generation could be misused to create misleading or harmful visual content, and (3) the blast radius is limited to image generation alone—no code execution, no data deletion, and no financial transactions.
From the tool's definition Tool description states 'Generate an image from a text prompt' — this creates new media content through the Runway API. The tool produces persistent artifacts (generated images) that are stored and retrievable.
Documented attack patterns abuse exactly the kind of access runway_generateImage gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Runway API MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for runway_generateImage:
{
"version": "1",
"default": "deny",
"tools": {
"runway_generateImage": {
"limits": [
{
"counter": "runway_generateimage_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}runway_generateImage stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Generate an image from a text prompt and optional reference images. Available ratios are 1920:1080, 1080:1920, 1024:1024, 1360:768, 1080:1080, 1168:880, 1440:1080, 1080:1440, 1808:768, 2112:912, 1280:720, 720:1280, 720:720, 960:720, 720:960, 1680:720. Use 1920:1080 by default. It also accepts reference images, in the form of either a url or a base64 encoded image. Each reference image has a tag, which is a string that refers to the image from the user prompt. For example, if the user prompt is. It is categorised as a Write tool in the Runway API MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Runway API MCP Server MCP server in PolicyLayer and add a rule for runway_generateImage: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Runway API MCP Server. Nothing to install.
runway_generateImage is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the runway_generateImage rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for runway_generateImage. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
runway_generateImage is provided by the Runway API MCP Server MCP server (runwayml/runway-api-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Runway API MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
7 Runway API MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.