Remove a user/agent/app/run record entirely (and cascade-delete its memories).
AI agents call delete_entities to permanently remove resources in Mem0 MCP Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
This tool irreversibly deletes data (entities and their associated memories) with no undo mechanism. Cascade deletion means the removal propagates to related records, amplifying the destructive impact. An AI agent misusing this tool could permanently erase all memories and records for a user/agent/app, resulting in significant data loss. This is a Destructive action, more severe than Write or Execute.
From the tool's definition Tool name 'delete_entities' combined with description 'Remove a user/agent/app/run record entirely (and cascade-delete its memories)' explicitly indicates irreversible deletion.
Attacks that exploit this kind of access
Remove a user/agent/app/run record entirely (and cascade-delete its memories). It is categorised as a Destructive tool in the Mem0 MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Mem0 MCP Server MCP server in PolicyLayer and add a rule for delete_entities: 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 Mem0 MCP Server. Nothing to install.
delete_entities 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 delete_entities 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 delete_entities. 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.
delete_entities is provided by the Mem0 MCP Server MCP server (mem0ai/mem0-mcp). 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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