Loads a sketch from user folder by index
AI agents call load_user to retrieve information from Open Brush MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool retrieves/queries a sketch file from a user folder based on an index parameter. This is a read-only operation with no side effects—it does not create, modify, delete, or execute code. The user's sketch data is not altered by loading it. While Open Brush is a creative tool, loading a sketch is fundamentally a data retrieval operation, making it a Read-category risk with low severity.
From the tool's definition Tool name 'load_user' and description 'Loads a sketch from user folder by index' indicate retrieval of existing data without modification or deletion.
Attacks that exploit this kind of access
Loads a sketch from user folder by index. It is categorised as a Read tool in the Open Brush MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Open Brush MCP Server MCP server in PolicyLayer and add a rule for load_user: 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 Open Brush MCP Server. Nothing to install.
load_user 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 load_user 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 load_user. 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.
load_user is provided by the Open Brush MCP Server MCP server (moz411/openbrush-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
load_user is one line of Open Brush MCP Server'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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