Update multiple existing relations in the knowledge graph
AI agents use update_relations to create or update resources in Knowledge Graph Memory Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Knowledge Graph Memory Server environment.
This tool modifies existing relations in a persistent knowledge graph, making it a Write operation. It is reversible (relations can be updated again or reverted), so it does not qualify as Destructive. The severity is medium because misuse could corrupt memory state across conversations, but the effects are recoverable through subsequent updates. High confidence due to explicit description of update semantics.
From the tool's definition Tool description states 'Update multiple existing relations in the knowledge graph' — a write operation that modifies existing data. The verb 'update' indicates reversible modification rather than deletion or execution.
Documented attack patterns abuse exactly the kind of access update_relations gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Knowledge Graph Memory Server, and nothing reaches the server without passing your rules. This is the rule we recommend for update_relations:
{
"version": "1",
"default": "deny",
"tools": {
"update_relations": {
"limits": [
{
"counter": "update_relations_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}update_relations stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Update multiple existing relations in the knowledge graph. It is categorised as a Write tool in the Knowledge Graph Memory Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Knowledge Graph Memory Server MCP server in PolicyLayer and add a rule for update_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 Knowledge Graph Memory Server. Nothing to install.
update_relations is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the update_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 update_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.
update_relations is provided by the Knowledge Graph Memory Server MCP server (itseasy21/mcp-knowledge-graph). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Knowledge Graph Memory Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
11 Knowledge Graph Memory Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.