Extract evidence of execution from UserAssist registry keys. Args: client_id: Velociraptor client ID. org_id: Optional Velociraptor org ID for multi-tenant deployments. Fields: Comma-separated list of fields to return. Returns: UserAssist artifact results as a string or error message.
AI agents call windows_execution_userassist to retrieve information from Velociraptor MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs forensic data retrieval from Windows registry artifacts without any side effects. It queries existing system state (UserAssist registry keys) to extract historical execution evidence. No data is modified, deleted, or executed. The blast radius is minimal—misuse would only expose forensic artifacts already present on the endpoint, not cause system changes or data loss.
From the tool's definition Tool 'windows_execution_userassist' extracts and retrieves execution evidence from UserAssist registry keys. Parameters are client_id, org_id, and field selection.
Documented attack patterns abuse exactly the kind of access windows_execution_userassist gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Velociraptor MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for windows_execution_userassist:
{
"version": "1",
"default": "deny",
"tools": {
"windows_execution_userassist": {}
}
}windows_execution_userassist is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Extract evidence of execution from UserAssist registry keys. Args: client_id: Velociraptor client ID. org_id: Optional Velociraptor org ID for multi-tenant deployments. Fields: Comma-separated list of fields to return. Returns: UserAssist artifact results as a string or error message. It is categorised as a Read tool in the Velociraptor MCP MCP Server, which means it retrieves data without modifying state.
Register the Velociraptor MCP server in PolicyLayer and add a rule for windows_execution_userassist: 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 Velociraptor MCP. Nothing to install.
windows_execution_userassist 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 windows_execution_userassist 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 windows_execution_userassist. 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.
windows_execution_userassist is provided by the Velociraptor MCP server (mgreen27/mcp-velociraptor). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Velociraptor MCP, 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.
28 Velociraptor MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.