Upscale an image to higher resolution while preserving quality. Use for enhancing low-resolution images.
AI agents use upscale_image to create or update resources in Fal Ai MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Fal Ai MCP Server environment.
This tool transforms/enhances an existing image by upscaling it to a higher resolution. It creates a new modified version of an image, which is a Write operation. It does not delete data, execute code, move money, or perform irreversible destructive actions. The original image is not overwritten — a new higher-resolution output is generated.
From the tool's definition Upscale an image to higher resolution while preserving quality. Use for enhancing low-resolution images.
Documented attack patterns abuse exactly the kind of access upscale_image gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Fal Ai MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for upscale_image:
{
"version": "1",
"default": "deny",
"tools": {
"upscale_image": {
"limits": [
{
"counter": "upscale_image_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}upscale_image 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.
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Upscale an image to higher resolution while preserving quality. Use for enhancing low-resolution images. It is categorised as a Write tool in the Fal Ai MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Fal Ai MCP Server MCP server in PolicyLayer and add a rule for upscale_image: 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 Fal Ai MCP Server. Nothing to install.
upscale_image 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 upscale_image 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 upscale_image. 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.
upscale_image is provided by the Fal Ai MCP Server MCP server (luminarylane/fal-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 18 Fal Ai MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
18 Fal Ai MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.