AI agents call list_styles to retrieve information from Darktable without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves information about installed photo editing presets/styles in darktable. It has no side effects—it only enumerates existing data. It falls squarely into the Read category. Severity is low because exposing a list of available presets poses minimal risk; an AI agent cannot misuse this to cause harm, data loss, or unwanted modifications.
From the tool's definition The tool is named 'list_styles' and is described as 'List all darktable styles (presets) installed on the user'. The verb 'List' is a read operation that queries and retrieves data without modifying, deleting, or executing external operations.
Attacks that exploit this kind of access
List all darktable styles (presets) installed on the user. It is categorised as a Read tool in the Darktable MCP Server, which means it retrieves data without modifying state.
Register the Darktable MCP server in PolicyLayer and add a rule for list_styles: 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 Darktable. Nothing to install.
list_styles 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_styles 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_styles. 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_styles is provided by the Darktable MCP server (w1ne/darktable-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
list_styles is one line of Darktable's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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