Pixelate a layer using a mosaic/block effect. Parameters: - block_size: Size of each mosaic block in pixels (default 10) - layer_name: Target layer; defaults to active layer - image_index: Target image index (default 0) Returns status dict.
AI agents use apply_pixelate to create or update resources in Gimp — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Gimp environment.
This tool creates or modifies image data (the pixelation effect) without permanent destruction—the change can be undone via GIMP's undo system or by re-opening the original file. It does not delete data, execute arbitrary code, or cause financial impact. It fits the Write category: creates or modifies data reversibly.
From the tool's definition apply_pixelate modifies image content by applying a pixelation/mosaic effect to a layer. The tool accepts parameters (block_size, layer_name, image_index) to target and transform pixel data, and returns a status dict indicating the operation completed.
Documented attack patterns abuse exactly the kind of access apply_pixelate gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Gimp, and nothing reaches the server without passing your rules. This is the rule we recommend for apply_pixelate:
{
"version": "1",
"default": "deny",
"tools": {
"apply_pixelate": {
"limits": [
{
"counter": "apply_pixelate_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}apply_pixelate 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.
Pixelate a layer using a mosaic/block effect. Parameters: - block_size: Size of each mosaic block in pixels (default 10) - layer_name: Target layer; defaults to active layer - image_index: Target image index (default 0) Returns status dict. It is categorised as a Write tool in the Gimp MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Gimp MCP server in PolicyLayer and add a rule for apply_pixelate: 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 Gimp. Nothing to install.
apply_pixelate 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 apply_pixelate 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 apply_pixelate. 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.
apply_pixelate is provided by the Gimp MCP server (maorcc/gimp-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Gimp, 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.
79 Gimp tools catalogued and risk-classified — across an index of 43,000+ MCP servers.