Open an image file in GIMP and create a display window. Parameters: - file_path: Absolute path to the image file to open (PNG, JPEG, TIFF, etc.) Returns: - image_id: internal GIMP image ID - width / height: image dimensions in pixels - color_mode: RGB / Grayscale / Indexed - num_layers: number of...
AI agents invoke open_image to trigger actions in Gimp. 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.
This tool triggers an external operation in GIMP — loading a file from disk and creating a display window. It's not a pure read (it causes side effects in the GIMP application state: allocating resources, creating an image object, opening a window). It falls under Execute as it triggers external application operations.
From the tool's definition Open an image file in GIMP and create a display window
Documented attack patterns abuse exactly the kind of access open_image 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 open_image:
{
"version": "1",
"default": "deny",
"tools": {
"open_image": {
"limits": [
{
"counter": "open_image_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}open_image 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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Open an image file in GIMP and create a display window. Parameters: - file_path: Absolute path to the image file to open (PNG, JPEG, TIFF, etc.) Returns: - image_id: internal GIMP image ID - width / height: image dimensions in pixels - color_mode: RGB / Grayscale / Indexed - num_layers: number of layers in the image - display_opened: whether a GIMP display window was created. It is categorised as a Execute tool in the Gimp MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Gimp MCP server in PolicyLayer and add a rule for open_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 Gimp. Nothing to install.
open_image 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 open_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 open_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.
open_image 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.