AI agents call clear_envelope to permanently remove resources in Reaper — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
This tool permanently removes all automation points from an envelope without the ability to recover them (undo is not guaranteed in MCP context). While the scope is limited to a single envelope rather than broader system data, the irreversible nature of deleting all points from a production element classifies it as Destructive.
From the tool's definition 'Delete all points from an envelope' - the word 'Delete' combined with 'all points' indicates irreversible removal of envelope automation data.
Documented attack patterns abuse exactly the kind of access clear_envelope 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 clear_envelope:
{
"version": "1",
"default": "deny",
"hide": [
"clear_envelope"
]
}clear_envelope disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.
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Delete all points from an envelope. It is categorised as a Destructive tool in the Reaper MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Reaper MCP server in PolicyLayer and add a rule for clear_envelope: 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.
clear_envelope is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the clear_envelope 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 clear_envelope. 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.
clear_envelope 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.