xadd · Redis MCP Server MCP: Risk & Policy

WHAT IT DOES

What xadd does on Redis MCP Server

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

WHY IT NEEDS A POLICY

Why xadd needs a policy

Redis XADD adds a new entry to a stream, which is a write operation. It creates/appends data but does not delete or execute code. Confidence is moderate because the description is empty and classification relies solely on knowledge of Redis commands.

From the tool's definition Tool name 'xadd' corresponds to the Redis XADD command, which appends entries to a stream. Description is empty, so classification is based on name alone.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

xadd Rate-limited

xadd 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": {
    "xadd": {
      "limits": [
        {
          "counter": "xadd_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 Redis MCP Server, so you can run agents against it safely.

FAQ

Questions about xadd

What does the xadd tool do? +

xadd. It is categorised as a Write tool in the Redis 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 xadd? +

Register the Redis MCP Server MCP server in PolicyLayer and add a rule for xadd: 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 Redis MCP Server. Nothing to install.

What risk level is xadd? +

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

Can I rate-limit xadd? +

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

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

xadd is provided by the Redis MCP Server MCP server (yuchenhui/mcp-redis). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.