memory_extract · Kova Mind MCP Server MCP: Risk & Policy

WHAT IT DOES

What memory_extract does on Kova Mind MCP Server

AI agents use memory_extract to create or update resources in Kova Mind MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Kova Mind MCP Server environment.

WHY IT NEEDS A POLICY

Why memory_extract needs a policy

This tool writes new data (memory patterns) derived from conversation messages into persistent storage. It is not purely read-only since it stores results, and it is not destructive or financial. The blast radius is medium because an AI agent could store incorrect, sensitive, or manipulated information about the user into their memory profile.

From the tool's definition 'Parses messages and stores learned patterns about the user'

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

memory_extract Rate-limited

memory_extract stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "memory_extract": {
      "limits": [
        {
          "counter": "memory_extract_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about memory_extract

What does the memory_extract tool do? +

Extract memory patterns from a conversation. Parses messages and stores learned patterns about the user. It is categorised as a Write tool in the Kova Mind MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on memory_extract? +

Register the Kova Mind MCP Server MCP server in PolicyLayer and add a rule for memory_extract: 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 Kova Mind MCP Server. Nothing to install.

What risk level is memory_extract? +

memory_extract is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit memory_extract? +

Yes. Add a rate_limit block to the memory_extract 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 memory_extract completely? +

Set action: deny in the PolicyLayer policy for memory_extract. 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 memory_extract? +

memory_extract is provided by the Kova Mind MCP Server MCP server (kovamind/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.