search_nodes · Graphiti Knowledge Graph MCP Server MCP

WHAT IT DOES

What search_nodes does on Graphiti Knowledge Graph MCP Server

AI agents call search_nodes to retrieve information from Graphiti Knowledge Graph MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

THE RISK

Low Risk

Why search_nodes needs a policy

This tool queries existing data in a knowledge graph and returns matching node summaries. It performs no modifications, deletions, or external operations. It is a straightforward read/search operation, making it the lowest-risk category.

From the tool's definition Tool name is 'search_nodes' and description states it 'Search[es] the knowledge graph for relevant node summaries' — a retrieval operation with no side effects.

Documented attack patterns abuse exactly the kind of access search_nodes gives an agent:

POLICY

How to control search_nodes

PolicyLayer is an MCP gateway — it sits between your AI agents and Graphiti Knowledge Graph MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for search_nodes:

policy.json

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

search_nodes is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Graphiti Knowledge Graph MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Graphiti Knowledge Graph MCP Server tools

Destructive clear_graph Clear all data from the knowledge graph and rebuild indices. Requires password authenticat Destructive delete_entity_edge Delete an entity edge from the knowledge graph Destructive delete_episode Delete an episode from the knowledge graph Destructive delete_everything_by_group_id Delete all data (episodes, nodes, and entity edges) associated with a group_id. This is an Write add_episode Add an episode to the knowledge graph (supports text, JSON, and message formats) Read get_entity_edge Get an entity edge by its UUID Read get_episodes Get the most recent episodes for a specific group Read get_queue_status Get the current status of all episode processing queues. Shows total pending tasks, active

All 11 Graphiti Knowledge Graph MCP Server tools →

Read tools on other servers

M-Team MCP Server get_torrent_detail YouTube MCP Server search_channel Android Forensics ADB MCP Server parse_browser_history 0xarchive web3_challenge

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about search_nodes

What does the search_nodes tool do? +

Search the knowledge graph for relevant node summaries. It is categorised as a Read tool in the Graphiti Knowledge Graph MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on search_nodes? +

Register the Graphiti Knowledge Graph MCP Server MCP server in PolicyLayer and add a rule for search_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 Graphiti Knowledge Graph MCP Server. Nothing to install.

What risk level is search_nodes? +

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

Can I rate-limit search_nodes? +

Yes. Add a rate_limit block to the search_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 search_nodes completely? +

Set action: deny in the PolicyLayer policy for search_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 search_nodes? +

search_nodes is provided by the Graphiti Knowledge Graph MCP Server MCP server (michabbb/graphiti-mcp-but-working). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Graphiti Knowledge Graph MCP Server tool call.

Start from Graphiti Knowledge Graph MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →

Free to start. No card required.

11 Graphiti Knowledge Graph MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.