list_rpush · Redis MCP: Risk & Policy

WHAT IT DOES

What list_rpush does on Redis MCP

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

WHY IT NEEDS A POLICY

Why list_rpush needs a policy

RPUSH is a standard Redis write operation that adds one or more elements to the tail of a list. It creates the list if it doesn't exist or appends to an existing one. This is reversible (elements can be removed), so it falls under Write rather than Destructive. Medium severity because misuse could pollute or grow lists unboundedly, but no irreversible damage.

From the tool's definition '右侧推入列表' means 'push to the right side of a list' — this is a Redis RPUSH operation that appends elements to a list, creating or modifying data reversibly.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

list_rpush Rate-limited

list_rpush 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": {
    "list_rpush": {
      "limits": [
        {
          "counter": "list_rpush_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, so you can run agents against it safely.

FAQ

Questions about list_rpush

What does the list_rpush tool do? +

右侧推入列表. It is categorised as a Write tool in the Redis MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on list_rpush? +

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

What risk level is list_rpush? +

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

Can I rate-limit list_rpush? +

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

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

list_rpush is provided by the Redis MCP server (pickstar-2002/redis-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.