List available Modbus registers for a given device category. Shows register addresses, names, data types, and units. For free-text search across all docs use victron_search_docs instead.
AI agents call victron_list_registers 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 a metadata listing operation only. It retrieves schema/configuration information about available registers without reading actual sensor data values, executing commands, or modifying any system state. The blast radius of misuse is minimal — an attacker gains only knowledge of the register structure, not access to actual power system control or data exfiltration beyond what the schema reveals.
From the tool's definition Tool description states 'List available Modbus registers' and 'Shows register addresses, names, data types, and units' — pure enumeration/query operation with no data modification or command execution.
Attacks that exploit this kind of access
List available Modbus registers for a given device category. Shows register addresses, names, data types, and units. For free-text search across all docs use victron_search_docs instead. 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_list_registers: 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_list_registers 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_list_registers 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_list_registers. 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_list_registers 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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