AI agents call list_vm_shares to retrieve information from Mcp Utm without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and displays information about VirtioFS shared directories for a VM. It performs a read-only query operation without modifying, deleting, or executing any actions. The information returned is configuration metadata about the VM, making it a straightforward Read category tool with low severity risk.
From the tool's definition Tool name contains 'list' and description states 'List shared directories', which is a query operation with no side effects.
Attacks that exploit this kind of access
List shared directories (VirtioFS) registered for a VM. It is categorised as a Read tool in the Mcp Utm MCP Server, which means it retrieves data without modifying state.
Register the Mcp Utm MCP server in PolicyLayer and add a rule for list_vm_shares: 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 Mcp Utm. Nothing to install.
list_vm_shares 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_vm_shares 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_vm_shares. 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_vm_shares is provided by the Mcp Utm MCP server (neverprepared/mcp-utm). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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