AI agents call memvid_tables 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 only retrieves and displays schema metadata from a SQLite database file. It has no side effects, does not modify data, execute code, delete anything, or commit financial operations. It is purely informational for debugging purposes. The blast radius of misuse is minimal—an agent could only learn about the database structure, not alter it.
From the tool's definition Tool name is 'memvid_tables' and description states it 'List[s] internal SQLite tables and structures' and 'Shows database schema for advanced debugging.' The return value is 'List of tables with column definitions' with no modification, deletion, or…
Attacks that exploit this kind of access
List internal SQLite tables and structures. Shows database schema for advanced debugging. Args: file: Path to the .mv2 memory file Returns: List of tables with column definitions. 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_tables: 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_tables 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_tables 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_tables. 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_tables 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 →