Fact extraction - list facts or extract from frame. Facts are structured assertions extracted from content. Args: file: Path to the .mv2 memory file frame_id: Extract facts from a specific frame list: List all extracted facts Returns: List of facts with source references
AI agents call memvid_facts 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.
memvid_facts retrieves structured information (facts) from memory files without creating, modifying, or deleting data. The operations (listing facts, extracting from frames) are read-only queries of existing content. No side effects, code execution, or data mutations occur. This is a classic Read category tool.
From the tool's definition Tool performs fact extraction and listing operations: 'list facts or extract from frame' and 'List all extracted facts'. These are retrieval operations with no modification, deletion, or execution capabilities.
Attacks that exploit this kind of access
Fact extraction - list facts or extract from frame. Facts are structured assertions extracted from content. Args: file: Path to the .mv2 memory file frame_id: Extract facts from a specific frame list: List all extracted facts Returns: List of facts with source references. 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_facts: 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_facts 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_facts 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_facts. 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_facts 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.
memvid_facts is one line of Memvid's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
Teams ship this data inside their own products. See what a licence covers →