setup_sidechain_compression
AI agents use setup_sidechain_compression to create or update resources in Reaper — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Reaper environment.
Based on the tool name, this likely configures sidechain compression routing and settings in REAPER DAW, which is a write/modify operation. However, the empty description reduces confidence significantly. Sibling tools like add_compressor suggest this server writes audio processing configurations. Sidechain compression setup would modify track FX chains and routing, making Write the most appropriate category.
From the tool's definition Tool name 'setup_sidechain_compression' and empty description. Name implies configuring/setting up sidechain compression on a track.
Documented attack patterns abuse exactly the kind of access setup_sidechain_compression gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Reaper, and nothing reaches the server without passing your rules. This is the rule we recommend for setup_sidechain_compression:
{
"version": "1",
"default": "deny",
"tools": {
"setup_sidechain_compression": {
"limits": [
{
"counter": "setup_sidechain_compression_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}setup_sidechain_compression stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
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setup_sidechain_compression. It is categorised as a Write tool in the Reaper MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Reaper MCP server in PolicyLayer and add a rule for setup_sidechain_compression: 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 Reaper. Nothing to install.
setup_sidechain_compression is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the setup_sidechain_compression 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 setup_sidechain_compression. 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.
setup_sidechain_compression is provided by the Reaper MCP server (twelvetake-studios/reaper-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Reaper, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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