Discover Venus OS devices via MQTT. Auto-discovers the portalId, lists all available services, maps them to tools, and outputs a ready-to-use MCP server config. Run this first when setting up MQTT transport.
AI agents call victron_mqtt_discover to retrieve information from Victron Tcp without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs network discovery and enumeration of available devices and services. It reads/queries the MQTT broker to find connected devices and list services — no data is modified, deleted, or executed. The output is informational (a config and service map). Severity is low as misuse would only reveal network topology information.
From the tool's definition Discover Venus OS devices via MQTT. Auto-discovers the portalId, lists all available services, maps them to tools
Attacks that exploit this kind of access
Discover Venus OS devices via MQTT. Auto-discovers the portalId, lists all available services, maps them to tools, and outputs a ready-to-use MCP server config. Run this first when setting up MQTT transport. It is categorised as a Read tool in the Victron Tcp MCP Server, which means it retrieves data without modifying state.
Register the Victron Tcp MCP server in PolicyLayer and add a rule for victron_mqtt_discover: 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 Victron Tcp. Nothing to install.
victron_mqtt_discover 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 victron_mqtt_discover 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 victron_mqtt_discover. 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.
victron_mqtt_discover is provided by the Victron Tcp MCP server (lubosstrejcek/victron-tcp). 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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