Insert an audio file onto a track.
AI agents use insert_audio_file 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.
This tool creates or modifies project state by inserting audio content into a track, which is a reversible write operation. It does not execute arbitrary code, delete data irreversibly, or move financial resources. The severity is medium because misuse could corrupt a music project or add unwanted audio, but changes can typically be undone in REAPER.
From the tool's definition Tool name 'insert_audio_file' and description 'Insert an audio file onto a track' indicate creation/modification of track content within a REAPER project.
Documented attack patterns abuse exactly the kind of access insert_audio_file 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 insert_audio_file:
{
"version": "1",
"default": "deny",
"tools": {
"insert_audio_file": {
"limits": [
{
"counter": "insert_audio_file_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}insert_audio_file 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.
Free to start. No card required.
Insert an audio file onto a track. 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 insert_audio_file: 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.
insert_audio_file 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 insert_audio_file 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 insert_audio_file. 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.
insert_audio_file 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.
Free to start. No card required.
158 Reaper tools catalogued and risk-classified — across an index of 43,000+ MCP servers.