invalidate_relation

Mark a relation as no longer valid. Sets the validUntil timestamp on the matching active relation. Use for temporal facts that have ended (e.g.,

SERVEREnhanced Knowledge Graph Memory Server SOURCEdanielsimonjr/memory-mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/danielsimonjr-memory-mcp/invalidate-relation.md

WHAT IT DOES

What invalidate_relation does on Enhanced Knowledge Graph Memory Server

AI agents use invalidate_relation to create or update resources in Enhanced Knowledge Graph Memory Server, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Enhanced Knowledge Graph Memory Server environment.

RISK

Why invalidate_relation is rated Medium

The tool modifies an existing relation by setting a validUntil timestamp, which is a reversible write operation (the data is not deleted, just marked as ended). It does not irreversibly destroy data, making it Write rather than Destructive.

From the tool's definition 'Mark a relation as no longer valid. Sets the validUntil timestamp on the matching active relation.'

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs invalidate_relation safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Enhanced Knowledge Graph Memory Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For invalidate_relation, this is the rule to start with:

invalidate_relation Rate-limited

invalidate_relation 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "invalidate_relation": {
      "limits": [
        {
          "counter": "invalidate_relation_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Enhanced Knowledge Graph Memory Server, apply this rule, and every invalidate_relation call is checked against it from then on.

FAQ

Questions about invalidate_relation

What does the invalidate_relation tool do? +

Mark a relation as no longer valid. Sets the validUntil timestamp on the matching active relation. Use for temporal facts that have ended (e.g.,. It is categorised as a Write tool in the Enhanced Knowledge Graph Memory Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on invalidate_relation? +

Register the Enhanced Knowledge Graph Memory Server MCP server in PolicyLayer and add a rule for invalidate_relation: 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 Enhanced Knowledge Graph Memory Server. Nothing to install.

What risk level is invalidate_relation? +

invalidate_relation is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit invalidate_relation? +

Yes. Add a rate_limit block to the invalidate_relation 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.

How do I block invalidate_relation completely? +

Set action: deny in the PolicyLayer policy for invalidate_relation. 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.

What MCP server provides invalidate_relation? +

invalidate_relation is provided by the Enhanced Knowledge Graph Memory Server MCP server (danielsimonjr/memory-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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