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lubosstrejcek

victron-tcp

Multi RS Status

victron_multi_status
Read-onlyIdempotent

Retrieve AC and battery parameters, charger/inverter state, and alarms from a Victron Multi RS inverter/charger via Modbus or MQTT.

Instructions

Get Multi RS inverter/charger data: AC input/output voltage/current/power per phase, input frequency, AC source type, current limits, battery voltage/current/power/SOC/temperature, charger/inverter state, and alarms. Use victron_discover to find the unit ID.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
hostYesGX device IP address or hostname
portNoModbus TCP port
unitIdNoModbus unit ID for the Multi RS
mqttHostNoMQTT broker host. Defaults to the "host" parameter or VICTRON_HOST env var.
mqttPortNoMQTT broker port. Defaults to VICTRON_MQTT_PORT env var or 1883.
portalIdNoVenus OS portal ID for MQTT topics. Use victron_mqtt_discover to find it. Defaults to VICTRON_PORTAL_ID env var.
transportNoTransport protocol. Defaults to VICTRON_TRANSPORT env var or "modbus".
deviceInstanceNoMQTT device instance number. If omitted, uses wildcard subscribe to find the first matching device.

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
readingsYes
serviceInstanceNo
Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnlyHint=true and destructiveHint=false, and the description consistently describes a read operation. It adds behavioral context by listing the specific data fields retrieved (voltages, currents, alarms), which is helpful beyond the annotations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, well-structured sentence that front-loads the core purpose and lists key data points efficiently. No redundant or irrelevant information is present.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the presence of an output schema, annotations covering safety, and 100% schema coverage, the description provides complete context for a read-only status tool. It references a sibling for discovery and covers all needed usage aspects.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100% with individual parameter descriptions in the schema. The description adds minimal extra meaning beyond summarizing the tool's purpose, but the pointer to 'victron_discover' for unitId is a useful hint.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states it retrieves data for a Multi RS inverter/charger, listing specific electrical parameters. This explicitly differentiates it from sibling tools like victron_inverter_status or victron_charger_status which target other devices.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description advises using 'victron_discover' to find the unit ID, which is a clear usage guideline. However, it does not explicitly state when not to use this tool or mention alternatives for other scenarios.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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