memory_open_nodes

Open and retrieve specific nodes in the user

SERVERVaultAssist SOURCE3xcaffeine/mcp-server

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/3xcaffeine-mcp-server/memory-open-nodes.md

WHAT IT DOES

What memory_open_nodes does on VaultAssist

AI agents call memory_open_nodes to retrieve information from VaultAssist without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why memory_open_nodes is rated Low

The tool opens and retrieves specific nodes, which is a read/fetch operation with no apparent side effects. The description is truncated ('in the user' appears incomplete), which slightly lowers confidence, but 'retrieve' strongly implies a read-only operation. Severity is low as it reads internal memory/knowledge graph nodes rather than sensitive external data.

From the tool's definition 'Open and retrieve specific nodes' — retrieves data from memory/knowledge graph nodes

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs memory_open_nodes safely

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

memory_open_nodes Allowed

memory_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": {
    "memory_open_nodes": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect VaultAssist, apply this rule, and every memory_open_nodes call is checked against it from then on.

FAQ

Questions about memory_open_nodes

What does the memory_open_nodes tool do? +

Open and retrieve specific nodes in the user. It is categorised as a Read tool in the VaultAssist MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on memory_open_nodes? +

Register the VaultAssist MCP server in PolicyLayer and add a rule for memory_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 VaultAssist. Nothing to install.

What risk level is memory_open_nodes? +

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

Can I rate-limit memory_open_nodes? +

Yes. Add a rate_limit block to the memory_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 memory_open_nodes completely? +

Set action: deny in the PolicyLayer policy for memory_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 memory_open_nodes? +

memory_open_nodes is provided by the VaultAssist MCP server (3xcaffeine/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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