kg_delete_edge
Delete a relationship (edge) from the knowledge graph.
This record as markdown: /tools/cowork-os/kg-delete-edge.md
What kg_delete_edge does on CoWork OS
AI agents call kg_delete_edge to permanently remove resources in CoWork OS, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Why kg_delete_edge is rated Critical
The tool permanently deletes edges (relationships) from a knowledge graph, which cannot be undone. This is a destructive operation that modifies the fundamental structure of stored knowledge. While not financial or involving code execution, the irreversible nature of deletion and the potential loss of important relationship metadata between knowledge entities warrants a high severity rating.
From the tool's definition Tool name explicitly contains 'delete' and description states 'Delete a relationship (edge) from the knowledge graph.' This irreversibly removes data structure connections.
Attacks that exploit this kind of access
The rule that runs kg_delete_edge safely
PolicyLayer is an MCP gateway: it sits between your AI agents and CoWork OS, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For kg_delete_edge, this is the rule to start with:
kg_delete_edge is removed from the agent's tool list entirely, so the agent never calls it. The rest of the server keeps working.
The button opens the PolicyLayer dashboard: create your workspace, connect CoWork OS, apply this rule, and every kg_delete_edge call is checked against it from then on.
Questions about kg_delete_edge
Delete a relationship (edge) from the knowledge graph. It is categorised as a Destructive tool in the CoWork OS MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the CoWork OS MCP server in PolicyLayer and add a rule for kg_delete_edge: 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 CoWork OS. Nothing to install.
kg_delete_edge 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 kg_delete_edge 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 kg_delete_edge. 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.
kg_delete_edge is provided by the CoWork OS MCP server (CoWork-OS/CoWork-OS). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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