AI agents invoke imageUpscale to trigger actions in Runware MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.
Upscaling an image triggers an external API operation (Runware API) that processes and transforms image data. It is not a simple read, nor does it delete data or involve finances. It executes an image transformation operation. Confidence is lowered due to the empty description.
From the tool's definition Tool name 'imageUpscale' and server description mentions 'upscaling' as one of the capabilities. Description is empty/uninformative.
Documented attack patterns abuse exactly the kind of access imageUpscale gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Runware MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for imageUpscale:
{
"version": "1",
"default": "deny",
"tools": {
"imageUpscale": {
"limits": [
{
"counter": "imageupscale_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}imageUpscale stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
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imageUpscale. It is categorised as a Execute tool in the Runware MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Runware MCP Server MCP server in PolicyLayer and add a rule for imageUpscale: 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 Runware MCP Server. Nothing to install.
imageUpscale is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the imageUpscale 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 imageUpscale. 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.
imageUpscale is provided by the Runware MCP Server MCP server (runware/mcp-runware). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Runware 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.
11 Runware MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.