List all layers in an image with their properties. Parameters: - image_index: Target image index (default 0) Returns: {layers: [{name, id, visible, opacity, blend_mode, width, height, has_alpha}], count}
AI agents call list_layers to retrieve information from Gimp without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only reads and returns layer information (name, id, visible, opacity, blend_mode, width, height, has_alpha) without creating, modifying, or deleting any data. It is a straightforward informational query with no blast radius if misused by an AI agent.
From the tool's definition Tool name is 'list_layers' and description states it 'List[s] all layers in an image with their properties' — a pure query operation that retrieves metadata about existing layers with no modification or side effects.
Documented attack patterns abuse exactly the kind of access list_layers 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 list_layers:
{
"version": "1",
"default": "deny",
"tools": {
"list_layers": {}
}
}list_layers is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List all layers in an image with their properties. Parameters: - image_index: Target image index (default 0) Returns: {layers: [{name, id, visible, opacity, blend_mode, width, height, has_alpha}], count}. It is categorised as a Read tool in the Gimp MCP Server, which means it retrieves data without modifying state.
Register the Gimp MCP server in PolicyLayer and add a rule for list_layers: 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.
list_layers 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 list_layers 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 list_layers. 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.
list_layers 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.
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79 Gimp tools catalogued and risk-classified — across an index of 43,000+ MCP servers.