Delete a memory by ID or content match (fuzzy). Use when the user says to forget something.
AI agents call forget to permanently remove resources in Mcp Memory — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
This tool permanently removes memory entries and cannot be undone. While the blast radius is constrained to a single agent's memory store (not production data or financial systems), deletion operations are categorized as Destructive per the rules. The high severity reflects that an AI agent incorrectly invoking 'forget' could lose important context or decision-relevant information that guides its behavior.
From the tool's definition Tool description explicitly states "Delete a memory by ID or content match". The verb "Delete" combined with ability to remove data by ID or fuzzy content matching indicates irreversible removal of stored information.
Attacks that exploit this kind of access
Delete a memory by ID or content match (fuzzy). Use when the user says to forget something. It is categorised as a Destructive tool in the Mcp Memory MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Mcp Memory MCP server in PolicyLayer and add a rule for 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 Mcp Memory. Nothing to install.
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 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 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.
forget is provided by the Mcp Memory MCP server (shipitandpray/mcp-memory). 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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