reaper-reapy-mcp

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test_connection

Confirm connectivity to REAPER DAW. Use it to validate the MCP server connection before executing track, FX, MIDI, or audio operations.

Instructions

Test connection to Reaper.

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": "test_connection"
  }
}

Input Schema

Name	Required	Description	Default
No arguments

Output Schema

Name	Required	Description	Default
`result`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

First observedv0.1.4Aug 7, 2026

TDQS

A3.6/5.0

Behavior2/5

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

There are no annotations, so the description bears full responsibility for disclosing behavior. 'Test connection' implies a non-destructive read-only check, but it does not state what happens on success or failure, whether it throws exceptions, or what the output represents. The description adds minimal behavioral context beyond what the tool name already implies.

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 five-word sentence with no fluff. It is front-loaded and every word earns its place, delivering the core purpose without unnecessary elaboration. For a zero-parameter tool, this is appropriately sized.

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?

Given the tool's extreme simplicity (no parameters, no annotations, and an existing output schema), the description is nearly complete for its intended purpose. It would benefit from a brief statement about the successful/failed connection result, but the output schema likely covers return values, so this is a minor gap.

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

Parameters4/5

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

This tool has zero parameters and the schema coverage is 100%, so there is nothing for the description to add about parameter meaning. The baseline for zero-parameter tools is 4, and the description does not need to elaborate further.

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 uses a specific verb ('Test') and a clear resource ('connection to Reaper'), making its purpose immediately obvious. It also stands apart from all sibling tools, which focus on tracks, regions, MIDI, and other DAW operations, so there is no ambiguity about what this tool does.

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

Usage Guidelines2/5

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

No guidance is provided on when to use this tool versus alternatives. The description does not explain that this should be a first-step connectivity check or mention any conditions where another tool would be more appropriate. With no exclusions or context, the agent is left to infer usage.

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