open_nodes

Open specific nodes by their names

SERVEREnhanced Knowledge Graph Memory Server SOURCEdanielsimonjr/memory-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/danielsimonjr-memory-mcp/open-nodes.md

WHAT IT DOES

What open_nodes does on Enhanced Knowledge Graph Memory Server

AI agents call open_nodes to retrieve information from Enhanced Knowledge Graph Memory Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why open_nodes is rated Low

The tool opens/retrieves specific nodes from the knowledge graph by name. This is a read-only lookup operation with no side effects. Misuse potential is low since it only exposes stored graph data.

From the tool's definition "Open specific nodes by their names" — retrieves nodes from the knowledge graph by name lookup, no modification implied

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs open_nodes 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 open_nodes, this is the rule to start with:

open_nodes Allowed

open_nodes is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "open_nodes": {}
  }
}

ALLOW ONLY 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 open_nodes call is checked against it from then on.

FAQ

Questions about open_nodes

What does the open_nodes tool do? +

Open specific nodes by their names. It is categorised as a Read tool in the Enhanced Knowledge Graph Memory Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on open_nodes? +

Register the Enhanced Knowledge Graph Memory Server MCP server in PolicyLayer and add a rule for open_nodes: 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 open_nodes? +

open_nodes is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit open_nodes? +

Yes. Add a rate_limit block to the open_nodes 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 open_nodes completely? +

Set action: deny in the PolicyLayer policy for open_nodes. 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 open_nodes? +

open_nodes 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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