brain.remember · Mnemexa MCP: Risk & Policy

WHAT IT DOES

What brain.remember does on Mnemexa MCP

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

WHY IT NEEDS A POLICY

Why brain.remember needs a policy

This tool writes data to a persistent memory store. It creates or modifies stored information, making it a Write operation. The severity is medium because an AI agent could misuse it to store incorrect, misleading, or sensitive information that persists across sessions and could be shared with multiple agents, potentially polluting shared knowledge bases.

From the tool's definition 'Store important information in Mnemexa' — explicitly stores/writes data into persistent memory

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

brain.remember Rate-limited

brain.remember 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": {
    "brain.remember": {
      "limits": [
        {
          "counter": "brain.remember_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 Mnemexa MCP, so you can run agents against it safely.

FAQ

Questions about brain.remember

What does the brain.remember tool do? +

Store important information in Mnemexa. It is categorised as a Write tool in the Mnemexa MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on brain.remember? +

Register the Mnemexa MCP server in PolicyLayer and add a rule for brain.remember: 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 Mnemexa MCP. Nothing to install.

What risk level is brain.remember? +

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

Can I rate-limit brain.remember? +

Yes. Add a rate_limit block to the brain.remember 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 brain.remember completely? +

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

brain.remember is provided by the Mnemexa MCP server (mnemexa/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.