Get virtual machine VNC console URL
AI agents call get_vm_vnc_url to retrieve information from CloudStack MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns a URL for remote console access. It is a read-only operation that retrieves data (the VNC URL) with no side effects, no code execution, no data modification, and no destructive capabilities. The severity is low because obtaining a VNC URL does not directly compromise the VM or its data; access control to the VNC endpoint itself would be a separate concern.
From the tool's definition Tool name is 'get_vm_vnc_url' and description states 'Get virtual machine VNC console URL' — this retrieves connection information without modifying infrastructure or triggering operations.
Attacks that exploit this kind of access
Get virtual machine VNC console URL. It is categorised as a Read tool in the CloudStack MCP Server MCP Server, which means it retrieves data without modifying state.
Register the CloudStack MCP Server MCP server in PolicyLayer and add a rule for get_vm_vnc_url: 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 CloudStack MCP Server. Nothing to install.
get_vm_vnc_url 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 get_vm_vnc_url 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 get_vm_vnc_url. 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.
get_vm_vnc_url is provided by the CloudStack MCP Server MCP server (mozg31337/cloudstack-mcp-server). 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.
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