kg_delete_entity
Delete an entity and all its relationships and observations from the knowledge graph.
This record as markdown: /tools/cowork-os/kg-delete-entity.md
What kg_delete_entity does on CoWork OS
AI agents call kg_delete_entity 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_entity is rated Critical
This tool permanently removes data (entities, relationships, observations) from a knowledge graph. The deletion is irreversible and destroys linked information. While not system-critical like a financial transfer or OS-level command, it causes permanent data loss within the application's knowledge system.
From the tool's definition Tool name 'kg_delete_entity' and description states it will 'Delete an entity and all its relationships and observations from the knowledge graph' — this is an irreversible deletion operation that removes data and cannot be undone.
Attacks that exploit this kind of access
The rule that runs kg_delete_entity 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_entity, this is the rule to start with:
kg_delete_entity 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_entity call is checked against it from then on.
Questions about kg_delete_entity
Delete an entity and all its relationships and observations 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_entity: 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_entity 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_entity 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_entity. 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_entity 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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