AI agents call stability_upscale to retrieve information from UnClick without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
width | number | — | Target width in pixels (default: 2048) |
api_key | string | Yes | |
engine_id | string | — | Upscale engine (default: esrgan-v1-x2plus) |
image_url | string | Yes | URL of the image to upscale |
Parameters from the server's own tool schema.
Even though stability_upscale only reads data, uncontrolled read access leaks sensitive information and racks up API costs — an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.
Risk signalsHandles credentials or secrets (api_key)
Attacks that exploit this kind of access
Upscale an image using Stability AI ESRGAN. It is categorised as a Read tool in the UnClick MCP Server, which means it retrieves data without modifying state.
stability_upscale accepts 4 parameters: width, api_key, engine_id, image_url. Required: api_key, image_url. The full parameter table on this page comes from the server's own tool schema.
Register the UnClick MCP server in PolicyLayer and add a rule for stability_upscale: 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 UnClick. Nothing to install.
stability_upscale is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the stability_upscale 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 stability_upscale. 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.
stability_upscale is provided by the UnClick MCP server (@unclick/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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