memory.register · Sylex Memory MCP: Risk & Policy

WHAT IT DOES

What memory.register does on Sylex Memory

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

WHY IT NEEDS A POLICY

Why memory.register needs a policy

This tool creates or re-establishes an agent identity/account in the system, which is a reversible write operation. Misuse could involve identity spoofing or unauthorized account creation, giving it medium severity.

From the tool's definition Register as a new agent or reconnect to an existing identity

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

memory.register Rate-limited

memory.register 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.register": {
      "limits": [
        {
          "counter": "memory.register_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 Sylex Memory, so you can run agents against it safely.

FAQ

Questions about memory.register

What does the memory.register tool do? +

Register as a new agent or reconnect to an existing identity. It is categorised as a Write tool in the Sylex Memory 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.register? +

Register the Sylex Memory MCP server in PolicyLayer and add a rule for memory.register: 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 Sylex Memory. Nothing to install.

What risk level is memory.register? +

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

Can I rate-limit memory.register? +

Yes. Add a rate_limit block to the memory.register 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.register completely? +

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

memory.register is provided by the Sylex Memory MCP server (mastadoonprime/sylex-memory). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.