xreadgroup

THE RISK

High Risk

The Redis XREADGROUP command reads messages from a stream and registers them as pending for a consumer group — it has both read and state-modification side effects (it advances consumer group offsets and marks messages as pending). This makes it more than a pure Read. Without a description to confirm exact behavior, confidence is lowered.

From the tool's definition Tool name 'xreadgroup' with empty description. Based on the name, this corresponds to the Redis XREADGROUP command, which reads messages from a stream as part of a consumer group.

Documented attack patterns abuse exactly the kind of access xreadgroup gives an agent:

HOW TO CONTROL XREADGROUP

PolicyLayer is an MCP gateway — it sits between your AI agents and Redis MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for xreadgroup:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "xreadgroup": {
      "limits": [
        {
          "counter": "xreadgroup_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

xreadgroup stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

Create a free account and register Redis MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

More Redis MCP Server tools

Destructive delete Delete a Redis key. Args: key (str): The key to delete. Returns: Destructive hdel Delete a field from a Redis hash. Args: name: The Redis hash key. key Destructive json_del Delete a JSON value from Redis at a given path. Args: name: The Redis key whe Destructive lpop Remove and return the first element from a Redis list. Destructive lrem Remove elements from a Redis list. Args: name: The name of the list c Destructive rpop Remove and return the last element from a Redis list. Destructive srem Remove a value from a Redis set. Args: name: The Redis set key. value Destructive xdel Delete an entry from a Redis stream. Args: key (str): The stream key.

All 53 Redis MCP Server tools →

Execute tools on other servers

Frida Game Hacking MCP remove_breakpoint Procmon request_elevation WireMCP capture_packets Pentest Ai run_probe

Go deeper

High-risk tools in Redis MCP Server → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

What does the xreadgroup tool do? +

xreadgroup. It is categorised as a Execute tool in the Redis MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on xreadgroup? +

Register the Redis MCP Server MCP server in PolicyLayer and add a rule for xreadgroup: 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 xreadgroup? +

xreadgroup is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit xreadgroup? +

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

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

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

Enforce policy on every Redis MCP Server tool call.

Deterministic rules across all 53 Redis MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

GOVERN REDIS →

Free to start. No card required.

53 Redis MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.

// WHAT XREADGROUP ON REDIS MCP SERVER DOES

// THE RISK

// HOW TO CONTROL XREADGROUP

// EXPLORE