memory_auto_config · Mementos MCP: Risk & Policy

WHAT IT DOES

What memory_auto_config does on Mementos

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

WHY IT NEEDS A POLICY

Why memory_auto_config needs a policy

This tool modifies system configuration settings (provider, model, enabled state, importance thresholds, entity linking behavior) at runtime. Changes are reversible (settings can be changed again), placing it in the Write category. Misuse could alter AI memory behavior significantly, warranting medium severity.

From the tool's definition Update auto-memory configuration at runtime (no restart needed). Set provider, model, enabled, minImportance, autoEntityLink.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

memory_auto_config Rate-limited

memory_auto_config 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_auto_config": {
      "limits": [
        {
          "counter": "memory_auto_config_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 Mementos, so you can run agents against it safely.

FAQ

Questions about memory_auto_config

What does the memory_auto_config tool do? +

Update auto-memory configuration at runtime (no restart needed). Set provider, model, enabled, minImportance, autoEntityLink. It is categorised as a Write tool in the Mementos 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_auto_config? +

Register the Mementos MCP server in PolicyLayer and add a rule for memory_auto_config: 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 Mementos. Nothing to install.

What risk level is memory_auto_config? +

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

Can I rate-limit memory_auto_config? +

Yes. Add a rate_limit block to the memory_auto_config 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_auto_config completely? +

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

memory_auto_config is provided by the Mementos MCP server (@hasna/mementos). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.