q-sys-mcp

Connect to Q-SYS

qsys_connect

Connect to a Q-SYS Core or Designer emulator over QRC protocol. Must be called before any other tool to establish communication.

Instructions

Connect to a Q-SYS Core or to Q-SYS Designer running in Emulate mode (press F6 in Designer), over the QRC protocol (TCP). For a local emulator use host "127.0.0.1" and port 1710. Must be called before any other tool.

Tool call template

This tool declares no required parameters. Add optional parameters from the input schema as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {},
    "name": "qsys_connect"
  }
}

Input Schema

Name	Required	Description	Default
`host`	No	Core IP/hostname, or 127.0.0.1 for a local Designer emulator	127.0.0.1
`port`	No	QRC port (default 1710)
`user`	No	Username, if the design requires authentication
`password`	No	Password, if the design requires authentication
`reconnect`	No	Auto-reconnect on a dropped socket (Core restart, network blip), replaying change-group registrations so polling resumes. Default true.

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedv0.2.0Jul 5, 2026

addedInput schema / properties / reconnect

Added value: +{
+  "default": true,
+  "description": "Auto-reconnect on a dropped socket (Core restart, network blip), replaying change-group registrations so polling resumes. Default true.",
+  "type": "boolean"
+}

First observedv0.1.1Jun 22, 2026

TDQS

A4.7/5.0

Behavior5/5

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

No annotations provided, but the description covers protocol (QRC over TCP), authentication, and auto-reconnect behavior with details on replaying registrations. This is comprehensive for a connect tool.

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 two sentences long, front-loading the main purpose and adding the prerequisite in the second. Every word earns its place with no redundancy.

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

Completeness4/5

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

The description adequately covers the tool's purpose and parameters, but it does not mention what the tool returns upon success or failure. Given no output schema, this minor gap exists.

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

Parameters5/5

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

Schema coverage is 100%, and the description adds value by explaining the rationale for default host/port values and the reconnect parameter's behavior, enhancing understanding beyond the schema.

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 the verb 'Connect' and the resource 'Q-SYS Core or Q-SYS Designer Emulator', with specific protocol details. It also distinguishes from sibling tools by noting it must be called first.

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 explicitly says 'Must be called before any other tool' and provides specific host/port examples for local emulator, giving clear context. It lacks explicit when-not-to-use instructions but is sufficient for its role as a setup tool.

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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