AI agents call clear_memory to permanently remove resources in MemGPT MCP Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
This tool permanently deletes the conversation history maintained by the memory system. Once cleared, past conversation context cannot be recovered, making it a destructive, irreversible action. Misuse by an AI agent could cause loss of all accumulated context and memory, which is high severity given the system's purpose is specifically to maintain conversation history for LLMs.
From the tool's definition 'Clear conversation history' — clearing history is an irreversible deletion of all stored conversation memory
Documented attack patterns abuse exactly the kind of access clear_memory gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and MemGPT MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for clear_memory:
{
"version": "1",
"default": "deny",
"hide": [
"clear_memory"
]
}clear_memory disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.
Free to start. No card required.
Clear conversation history. It is categorised as a Destructive tool in the MemGPT MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the MemGPT MCP Server MCP server in PolicyLayer and add a rule for clear_memory: 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 MemGPT MCP Server. Nothing to install.
clear_memory 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_memory 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_memory. 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_memory is provided by the MemGPT MCP Server MCP server (vic563/memgpt-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from MemGPT MCP Server, 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.
5 MemGPT MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.