Draw a rectangle outline (stroke only) on a layer. Parameters: - x, y: Top-left corner - width, height: Rectangle dimensions - color: Stroke color; uses current foreground if omitted - line_width: Stroke width in pixels (default 2.0) - layer_name: Target layer; defaults to active layer - image_in...
AI agents use draw_rectangle 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.
The tool creates or modifies image data by drawing a rectangle on a layer, which is a reversible operation typical of image editing (paint, stroke, draw operations). It does not execute arbitrary code, delete data, or have financial impact. While it mutates the image, the change can be undone via GIMP's undo functionality, making it Write rather than Destructive.
From the tool's definition Tool description states it will 'Draw a rectangle outline (stroke only) on a layer' with parameters for positioning, dimensions, color, and line width. This modifies image data by adding graphical content to a specified layer.
Documented attack patterns abuse exactly the kind of access draw_rectangle 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 draw_rectangle:
{
"version": "1",
"default": "deny",
"tools": {
"draw_rectangle": {
"limits": [
{
"counter": "draw_rectangle_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}draw_rectangle 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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Draw a rectangle outline (stroke only) on a layer. Parameters: - x, y: Top-left corner - width, height: Rectangle dimensions - color: Stroke color; uses current foreground if omitted - line_width: Stroke width in pixels (default 2.0) - 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 draw_rectangle: 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.
draw_rectangle 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 draw_rectangle 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 draw_rectangle. 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.
draw_rectangle 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.