graph-node-upsert · MCP Index Notes MCP: Risk & Policy

WHAT IT DOES

What graph-node-upsert does on MCP Index Notes

AI agents use graph-node-upsert to create or update resources in MCP Index Notes — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your MCP Index Notes environment.

WHY IT NEEDS A POLICY

Why graph-node-upsert needs a policy

This tool performs reversible data modifications (upsert operations) on graph nodes within the knowledge graph system. It does not execute arbitrary code, delete data irreversibly, or involve financial transactions. While it modifies the underlying knowledge structure, the changes are not destructive and can be undone through subsequent updates or deletions.

From the tool's definition Tool description states 'Create or update a graph node' which are Write operations. The tool modifies data in the knowledge graph by creating new nodes or updating existing ones.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

graph-node-upsert Rate-limited

graph-node-upsert 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": {
    "graph-node-upsert": {
      "limits": [
        {
          "counter": "graph-node-upsert_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches MCP Index Notes, so you can run agents against it safely.

FAQ

Questions about graph-node-upsert

What does the graph-node-upsert tool do? +

Create or update a graph node with label/type/props. Returns node id. It is categorised as a Write tool in the MCP Index Notes MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on graph-node-upsert? +

Register the MCP Index Notes MCP server in PolicyLayer and add a rule for graph-node-upsert: 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 MCP Index Notes. Nothing to install.

What risk level is graph-node-upsert? +

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

Can I rate-limit graph-node-upsert? +

Yes. Add a rate_limit block to the graph-node-upsert 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 graph-node-upsert completely? +

Set action: deny in the PolicyLayer policy for graph-node-upsert. 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 graph-node-upsert? +

graph-node-upsert is provided by the MCP Index Notes MCP server (vjsr007/mcp-index-notes). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.