Insert audio/MIDI file into track.
AI agents use item_insert_media to create or update resources in ReaperMCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your ReaperMCP environment.
This tool creates new media items within a REAPER project by inserting audio or MIDI files into tracks. While reversible (items can be deleted), it modifies project state and could introduce unwanted audio content, require time to undo, or disrupt an ongoing production workflow if misused by an AI agent.
From the tool's definition Tool name 'item_insert_media' and description 'Insert audio/MIDI file into track' directly indicate creation/modification of track content. 'Insert' is a write operation that adds new media elements to a project.
Documented attack patterns abuse exactly the kind of access item_insert_media gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and ReaperMCP, and nothing reaches the server without passing your rules. This is the rule we recommend for item_insert_media:
{
"version": "1",
"default": "deny",
"tools": {
"item_insert_media": {
"limits": [
{
"counter": "item_insert_media_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}item_insert_media 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 audio/MIDI file into track. It is categorised as a Write tool in the ReaperMCP 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 item_insert_media: 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 ReaperMCP. Nothing to install.
item_insert_media 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 item_insert_media 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 item_insert_media. 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.
item_insert_media is provided by the Reaper MCP server (xdarkzx/reaper-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from ReaperMCP, 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.
138 ReaperMCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.