Show dataflow topology as a visual Mermaid diagram: Hosts -> CNodes -> Views with bandwidth and IOPS labels. Returns a ready-to-render Mermaid diagram. For tabular data, use list_dataflow_vast instead.
AI agents call list_dataflow_diagram_vast to retrieve information from VAST Admin MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and visualizes system topology information (Hosts, CNodes, Views with metrics) without creating, modifying, deleting, or executing any state-changing operations. It is a read-only monitoring/diagnostic tool that generates a diagram representation of existing infrastructure data. No side effects or irreversible actions are possible.
From the tool's definition Tool performs 'Show dataflow topology as a visual Mermaid diagram' and 'Returns a ready-to-render Mermaid diagram' — purely informational/visualization operations with no data modification, deletion, or execution of external operations.
Documented attack patterns abuse exactly the kind of access list_dataflow_diagram_vast gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and VAST Admin MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for list_dataflow_diagram_vast:
{
"version": "1",
"default": "deny",
"tools": {
"list_dataflow_diagram_vast": {}
}
}list_dataflow_diagram_vast 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.
Show dataflow topology as a visual Mermaid diagram: Hosts -> CNodes -> Views with bandwidth and IOPS labels. Returns a ready-to-render Mermaid diagram. For tabular data, use list_dataflow_vast instead. It is categorised as a Read tool in the VAST Admin MCP Server MCP Server, which means it retrieves data without modifying state.
Register the VAST Admin MCP Server MCP server in PolicyLayer and add a rule for list_dataflow_diagram_vast: 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 VAST Admin MCP Server. Nothing to install.
list_dataflow_diagram_vast 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_dataflow_diagram_vast 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_dataflow_diagram_vast. 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_dataflow_diagram_vast is provided by the VAST Admin MCP Server MCP server (vast-data/vast-admin-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from VAST Admin MCP Server, 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.
16 VAST Admin MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.