AI agents use dsl_midi_insert to create or update resources in REAPER MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your REAPER MCP Server environment.
The tool creates/modifies project content (MIDI data) reversibly—it can be undone. This is Write category rather than Destructive (no irreversible deletion) or Execute (not arbitrary code execution). Confidence is moderate (0.72) rather than high because the description is empty; however, the name and server context strongly suggest MIDI insertion/creation.
From the tool's definition Tool name 'dsl_midi_insert' indicates insertion of MIDI data into a REAPER project. Sibling tools like 'dsl_automate', 'dsl_create_bus', and 'dsl_adjust_effect' confirm this server performs data-modifying operations.
Documented attack patterns abuse exactly the kind of access dsl_midi_insert gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and REAPER MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for dsl_midi_insert:
{
"version": "1",
"default": "deny",
"tools": {
"dsl_midi_insert": {
"limits": [
{
"counter": "dsl_midi_insert_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}dsl_midi_insert 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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dsl_midi_insert. It is categorised as a Write tool in the REAPER MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the REAPER MCP Server MCP server in PolicyLayer and add a rule for dsl_midi_insert: 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 MCP Server. Nothing to install.
dsl_midi_insert 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 dsl_midi_insert 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 dsl_midi_insert. 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.
dsl_midi_insert is provided by the REAPER MCP Server MCP server (shiehn/total-reaper-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 45 REAPER MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
45 REAPER MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.