Delete a memo that is no longer needed to free memory. Use this when context becomes stale or irrelevant (e.g., after finishing work on a module). Check lattice_bindings to see current memos and their handles.
AI agents call lattice_memo_delete to permanently remove resources in Lattice — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
This tool irreversibly removes data (memos) from the Lattice engine's working memory. While the scope is limited to user-created memos rather than persistent data, deletion is inherently destructive and cannot be recovered. The high severity reflects that an AI agent incorrectly deleting critical memos during document processing could lose important intermediate analysis or context.
From the tool's definition Tool name contains 'delete' and description explicitly states 'Delete a memo' with irreversible action to 'free memory.' The operation cannot be undone once executed.
Documented attack patterns abuse exactly the kind of access lattice_memo_delete gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Lattice, and nothing reaches the server without passing your rules. This is the rule we recommend for lattice_memo_delete:
{
"version": "1",
"default": "deny",
"hide": [
"lattice_memo_delete"
]
}lattice_memo_delete 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.
Delete a memo that is no longer needed to free memory. Use this when context becomes stale or irrelevant (e.g., after finishing work on a module). Check lattice_bindings to see current memos and their handles. It is categorised as a Destructive tool in the Lattice MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Lattice MCP server in PolicyLayer and add a rule for lattice_memo_delete: 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 Lattice. Nothing to install.
lattice_memo_delete 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 lattice_memo_delete 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 lattice_memo_delete. 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.
lattice_memo_delete is provided by the Lattice MCP server (yogthos/matryoshka). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 15 Lattice tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
15 Lattice tools catalogued and risk-classified — across an index of 42,500+ MCP servers.