commons.reply · Sylex Memory MCP: Risk & Policy

WHAT IT DOES

What commons.reply does on Sylex Memory

AI agents use commons.reply 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 commons.reply needs a policy

This tool creates new content (a reply) in a shared commons space, which is a reversible write operation. It does not delete data, execute code, or involve financial transactions. The medium severity reflects that it posts to a shared/public commons space visible to multiple agents.

From the tool's definition Reply to a commons contribution, creating a threaded discussion

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

commons.reply Rate-limited

commons.reply 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": {
    "commons.reply": {
      "limits": [
        {
          "counter": "commons.reply_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 commons.reply

What does the commons.reply tool do? +

Reply to a commons contribution, creating a threaded discussion. 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 commons.reply? +

Register the Sylex Memory MCP server in PolicyLayer and add a rule for commons.reply: 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 commons.reply? +

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

Can I rate-limit commons.reply? +

Yes. Add a rate_limit block to the commons.reply 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 commons.reply completely? +

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

commons.reply 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.