memvid_nudge · Memvid MCP: Risk & Policy

WHAT IT DOES

What memvid_nudge does on Memvid

AI agents invoke memvid_nudge to trigger actions in Memvid. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why memvid_nudge needs a policy

This tool executes background processes rather than simply reading or writing data in a reversible way. While the operations themselves are not destructive, they represent triggered external operations that modify system state (indexes, embeddings, extracted entities) in ways that could have downstream consequences depending on file contents and implementation.

From the tool's definition Tool description states 'trigger background processing' of operations including 'Index updates', 'Embedding generation', and 'Entity extraction'.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

memvid_nudge Rate-limited

memvid_nudge stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "memvid_nudge": {
      "limits": [
        {
          "counter": "memvid_nudge_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Memvid, so you can run agents against it safely.

FAQ

Questions about memvid_nudge

What does the memvid_nudge tool do? +

Nudge operations - trigger background processing. Forces processing of pending operations like: - Index updates - Embedding generation - Entity extraction Args: file: Path to the .mv2 memory file Returns: Processing trigger confirmation. It is categorised as a Execute tool in the Memvid MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on memvid_nudge? +

Register the Memvid MCP server in PolicyLayer and add a rule for memvid_nudge: 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.

What risk level is memvid_nudge? +

memvid_nudge is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit memvid_nudge? +

Yes. Add a rate_limit block to the memvid_nudge 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.

How do I block memvid_nudge completely? +

Set action: deny in the PolicyLayer policy for memvid_nudge. 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.

What MCP server provides memvid_nudge? +

memvid_nudge 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.