Arm/disarm track for recording.
AI agents use track_set_record_arm 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 enables modification of track state (arming/disarming for recording), which is a reversible configuration change that affects the project's recording behavior. It does not execute arbitrary code or irreversibly delete data, but it does alter project state.
From the tool's definition Tool name 'track_set_record_arm' and description 'Arm/disarm track for recording' indicate the tool modifies the record arm state of a track, which changes the recording configuration of the project.
Documented attack patterns abuse exactly the kind of access track_set_record_arm 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 track_set_record_arm:
{
"version": "1",
"default": "deny",
"tools": {
"track_set_record_arm": {
"limits": [
{
"counter": "track_set_record_arm_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}track_set_record_arm 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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Arm/disarm track for recording. 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 track_set_record_arm: 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.
track_set_record_arm 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 track_set_record_arm 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 track_set_record_arm. 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.
track_set_record_arm 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.