Delete a previously stored memory by key. Use when context is stale, the task is done, or you want to clear sensitive data the agent saved earlier. Pair with remember and recall.
AI agents call forget to permanently remove resources in Mcp Nager Holidays — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
| Parameter | Type | Required | Description |
|---|---|---|---|
key | string | Yes | Memory key to delete |
Parameters from the server's own tool schema.
Although this tool operates on agent memory (not production data), deletion is inherently destructive and irreversible. An AI agent could maliciously or erroneously delete memory entries needed for task continuity, audit trails, or recovery.
From the tool's definition 'Delete a previously stored memory by key' - the tool explicitly performs deletion with no undo mechanism mentioned. The description confirms it removes data 'when...you want to clear' data, indicating irreversible data removal.
Attacks that exploit this kind of access
Delete a previously stored memory by key. Use when context is stale, the task is done, or you want to clear sensitive data the agent saved earlier. Pair with remember and recall. It is categorised as a Destructive tool in the Mcp Nager Holidays MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
forget accepts 1 parameter: key. Required: key. The full parameter table on this page comes from the server's own tool schema.
Register the Mcp Nager Holidays 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 Nager Holidays. 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 Nager Holidays MCP server (pipeworx-io/mcp-nager-holidays). 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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