Get neighbors of a node (by id or label/type) up to a depth and limit.
AI agents call graph-neighbors to retrieve information from MCP Index Notes without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves relational data from an existing knowledge graph by traversing connections between nodes. It performs a read-only query operation with no side effects, no data modification, and no execution of external code. The parameters (id, label/type, depth, limit) control the scope of retrieval but not the nature of the operation.
From the tool's definition Tool name 'graph-neighbors' and description 'Get neighbors of a node (by id or label/type) up to a depth and limit' indicate a retrieval operation that queries the knowledge graph structure without modifying, deleting, or executing external operations.
Attacks that exploit this kind of access
Get neighbors of a node (by id or label/type) up to a depth and limit. It is categorised as a Read tool in the MCP Index Notes MCP Server, which means it retrieves data without modifying state.
Register the MCP Index Notes MCP server in PolicyLayer and add a rule for graph-neighbors: 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.
graph-neighbors 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 graph-neighbors 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 graph-neighbors. 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.
graph-neighbors 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.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
Teams ship this data inside their own products. See what a licence covers →