Delete multiple relations from the knowledge graph
AI agents call delete_relations to permanently remove resources in MCP Memory Server - HTTP Streaming — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
The tool permanently removes relations (connections between entities) from the knowledge graph without reversibility. While not as catastrophic as deleting all entities, this is a destructive operation that irreversibly alters the structure and content of the knowledge base. An AI agent with unrestricted access could corrupt the graph's integrity by removing critical relationship data.
From the tool's definition Tool name 'delete_relations' and description 'Delete multiple relations from the knowledge graph' explicitly indicate irreversible deletion of data from the knowledge base.
Attacks that exploit this kind of access
Delete multiple relations from the knowledge graph. It is categorised as a Destructive tool in the MCP Memory Server - HTTP Streaming MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the MCP Memory Server - HTTP Streaming MCP server in PolicyLayer and add a rule for delete_relations: 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 Server - HTTP Streaming. Nothing to install.
delete_relations 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_relations 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_relations. 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_relations is provided by the MCP Memory Server - HTTP Streaming MCP server (songlairui/mcp-memory-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
delete_relations is one line of MCP Memory Server - HTTP Streaming's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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