Update content of a specific frame. Replaces the entire content of the frame. For partial corrections, use memvid_correct instead. Args: file: Path to the .mv2 memory file frame_id: Frame ID to update content: New content for the frame Returns: JSON with update confirmation
AI agents use memvid_update to create or update resources in Memvid — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Memvid environment.
memvid_update modifies existing data (frame content) in a memory file, which is a Write operation. The modification is reversible since it can be updated again or corrected using memvid_correct.
From the tool's definition Tool description explicitly states it will "Update content of a specific frame" and "Replaces the entire content of the frame." These are write operations that modify data reversibly.
Attacks that exploit this kind of access
Update content of a specific frame. Replaces the entire content of the frame. For partial corrections, use memvid_correct instead. Args: file: Path to the .mv2 memory file frame_id: Frame ID to update content: New content for the frame Returns: JSON with update confirmation. It is categorised as a Write tool in the Memvid MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Memvid MCP server in PolicyLayer and add a rule for memvid_update: 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_update is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the memvid_update 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_update. 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_update 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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