Reverse a schema promotion by proposal id: move its triples out of kg:tbox into kg:tbox-demoted, drop kg:inferred, and log a SchemaDemoted event. Reversible, queryable, by-id.
AI agents call kg_demote to permanently remove resources in Predicate — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
While the description claims the operation is 'reversible', it involves removing/dropping triples from the active schema (kg:tbox) and dropping inferred knowledge (kg:inferred). Moving schema triples out of the active namespace and dropping inferred data has significant structural consequences on the knowledge graph — it can cause cascading breakage of dependent reasoning chains.
From the tool's definition 'Reverse a schema promotion', 'move its triples out of kg:tbox into kg:tbox-demoted', 'drop kg:inferred'
Attacks that exploit this kind of access
Reverse a schema promotion by proposal id: move its triples out of kg:tbox into kg:tbox-demoted, drop kg:inferred, and log a SchemaDemoted event. Reversible, queryable, by-id. It is categorised as a Destructive tool in the Predicate MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Predicate MCP server in PolicyLayer and add a rule for kg_demote: 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 Predicate. Nothing to install.
kg_demote 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_demote 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_demote. 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_demote is provided by the Predicate MCP server (nordicagents/predicate). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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