Schema operations - infer or show schema summary. Can infer schemas from stored data or show existing schema definitions. Args: file: Path to the .mv2 memory file infer: Infer schemas from stored data summary: Show schema summary Returns: Schema information or inferred schemas
AI agents call memvid_schema 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 retrieves and displays schema metadata about memory files without creating, modifying, or deleting data. It is purely informational and has no side effects on the stored data itself.
From the tool's definition Tool description states it can 'infer schemas from stored data or show existing schema definitions' and 'Returns: Schema information or inferred schemas'. The args include 'infer' and 'summary' flags which are query/inspection operations.
Attacks that exploit this kind of access
Schema operations - infer or show schema summary. Can infer schemas from stored data or show existing schema definitions. Args: file: Path to the .mv2 memory file infer: Infer schemas from stored data summary: Show schema summary Returns: Schema information or inferred schemas. 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_schema: 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_schema 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_schema 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_schema. 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_schema 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.
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