pagerank · Neo4j Gds MCP: Risk & Policy

WHAT IT DOES

What pagerank does on Neo4j Gds

AI agents invoke pagerank to trigger actions in Neo4j Gds. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why pagerank needs a policy

PageRank is a well-known graph algorithm that computes node importance/centrality scores. Based on the server context, this tool executes a graph algorithm on a Neo4j database. The description is empty, so confidence is reduced, but sibling tools (betweenness_centrality, article_rank, etc.) confirm this is an algorithm execution tool.

From the tool's definition Tool name 'pagerank' on a server described as running 'complex graph algorithms' by 'selecting and executing appropriate parameterised graph algorithms' on Neo4j databases.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

pagerank Rate-limited

pagerank stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "pagerank": {
      "limits": [
        {
          "counter": "pagerank_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Neo4j Gds, so you can run agents against it safely.

FAQ

Questions about pagerank

What does the pagerank tool do? +

pagerank. It is categorised as a Execute tool in the Neo4j Gds MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on pagerank? +

Register the Neo4j Gds MCP server in PolicyLayer and add a rule for pagerank: 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 Neo4j Gds. Nothing to install.

What risk level is pagerank? +

pagerank is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit pagerank? +

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

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

pagerank is provided by the Neo4j Gds MCP server (neo4j-contrib/gds-agent). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.