delete · Mnemosyne MCP: Risk & Policy

WHAT IT DOES

What delete does on Mnemosyne MCP

AI agents call delete to permanently remove resources in Mnemosyne MCP — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.

WHY IT NEEDS A POLICY

Why delete needs a policy

The 'delete' tool operates in the Mnemosyne knowledge graph system where data is stored persistently in RDF graphs. Deletion of graph nodes, relationships, or metadata cannot be undone and represents irreversible data loss.

From the tool's definition Tool name 'delete' on a knowledge graph management server with SPARQL and RDF operations. The name explicitly indicates deletion. Context shows this server manages persistent graph data structures.

Attacks that exploit this kind of access

Questions about delete

What does the delete tool do? +

delete. It is categorised as a Destructive tool in the Mnemosyne MCP MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.

How do I enforce a policy on delete? +

Register the Mnemosyne MCP server in PolicyLayer and add a rule for 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 Mnemosyne MCP. Nothing to install.

What risk level is delete? +

delete is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit delete? +

Yes. Add a rate_limit block to the 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.

How do I block delete completely? +

Set action: deny in the PolicyLayer policy for 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.

What MCP server provides delete? +

delete is provided by the Mnemosyne MCP server (sophia-labs/mnemosyne-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.