list_lpush · Redis MCP: Risk & Policy

WHAT IT DOES

What list_lpush does on Redis MCP

AI agents use list_lpush 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_lpush needs a policy

LPUSH creates or modifies a Redis list by prepending one or more values. This is a reversible write operation with no destructive or financial implications. Misuse could pollute list data structures but effects are recoverable.

From the tool's definition '左侧推入列表' means 'push to the left side of a list' — this is a Redis LPUSH operation that inserts/creates data in a list

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

list_lpush Rate-limited

list_lpush 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_lpush": {
      "limits": [
        {
          "counter": "list_lpush_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_lpush

What does the list_lpush tool do? +

左侧推入列表. 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_lpush? +

Register the Redis MCP server in PolicyLayer and add a rule for list_lpush: 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_lpush? +

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

Can I rate-limit list_lpush? +

Yes. Add a rate_limit block to the list_lpush 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_lpush completely? +

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

list_lpush 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.