AI agents call fast_rp to retrieve information from Neo4j Gds without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
FastRP is a read-only graph algorithm that analyzes the structure of a graph and produces embeddings. It retrieves/computes derived data without modifying the graph, executing code, or causing side effects. Misuse would have minimal blast radius—worst case, resource exhaustion from large graph processing, not data loss or external damage.
From the tool's definition Tool computes and returns vector representations of nodes ('computes a vector representation for every node in the graph'); no mention of modification, deletion, or execution of external operations.
Risk signalsBulk/mass operation — affects multiple targets
Attacks that exploit this kind of access
Fast Random Projection (FastRP) is a node embedding algorithm that computes a vector representation for every node in the graph. It is categorised as a Read tool in the Neo4j Gds MCP Server, which means it retrieves data without modifying state.
Register the Neo4j Gds MCP server in PolicyLayer and add a rule for fast_rp: 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.
fast_rp is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the fast_rp 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.
Set action: deny in the PolicyLayer policy for fast_rp. 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.
fast_rp 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.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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