Delete a memory by ID.
AI agents call mem_forget to permanently remove resources in Crossmem — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
This tool permanently removes memories from the cross-project knowledge store without the ability to undo the action. While the blast radius is limited to memory records rather than production data, deletion is inherently destructive and irreversible.
From the tool's definition Tool name 'mem_forget' with description 'Delete a memory by ID' directly indicates irreversible deletion of stored data.
Attacks that exploit this kind of access
Delete a memory by ID. It is categorised as a Destructive tool in the Crossmem MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Crossmem MCP server in PolicyLayer and add a rule for mem_forget: 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 Crossmem. Nothing to install.
mem_forget 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 mem_forget 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 mem_forget. 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.
mem_forget is provided by the Crossmem MCP server (jamiemoles/crossmem). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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