Follow entity relationships in the knowledge graph. Traverses the entity graph starting from a given entity. Args: file: Path to the .mv2 memory file entity: Starting entity name link: Relationship type to follow (default:
AI agents call memvid_follow to retrieve information from Memvid without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a graph traversal operation to retrieve and display entity relationships. It is a read-only operation that queries existing data structures without side effects, modifications, or state changes. The blast radius of misuse is minimal—worst case, an agent could extract sensitive relationship information from the knowledge graph, but cannot alter, delete, or execute anything.
From the tool's definition Tool description states 'Traverses the entity graph starting from a given entity' and 'Follow entity relationships in the knowledge graph'. No modifications, deletions, or executions are described.
Attacks that exploit this kind of access
Follow entity relationships in the knowledge graph. Traverses the entity graph starting from a given entity. Args: file: Path to the .mv2 memory file entity: Starting entity name link: Relationship type to follow (default:. It is categorised as a Read tool in the Memvid MCP Server, which means it retrieves data without modifying state.
Register the Memvid MCP server in PolicyLayer and add a rule for memvid_follow: 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 Memvid. Nothing to install.
memvid_follow 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 memvid_follow 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 memvid_follow. 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.
memvid_follow is provided by the Memvid MCP server (tapiocapioca/memvid-mcp). 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 →