lpop

THE RISK

Critical Risk

The lpop operation permanently removes an element from a list, making this a destructive action that cannot be undone without external recovery mechanisms. While it returns the value before removal, the primary effect is irreversible data deletion. This is more severe than Write (which is reversible) and qualifies as Destructive.

From the tool's definition Tool description states 'Remove and return the first element from a Redis list.' The verb 'Remove' indicates irreversible deletion of data from a Redis list structure.

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

HOW TO CONTROL LPOP

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 lpop:

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "lpop"
  ]
}

lpop disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.

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.

RESTRICT 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 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. Destructive xgroup_destroy Destroy a consumer group for a Redis stream. Args: key (str): The stream key.

All 53 Redis MCP Server tools →

Destructive tools on other servers

Frida Game Hacking MCP clear_scan MegaMemory remove_concept Frida Agent MCP kill_app 1MCP Server mcp_uninstall

Go deeper

Critical-risk tools in Redis MCP Server → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-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 lpop tool do? +

Remove and return the first element from a Redis list. It is categorised as a Destructive tool in the Redis MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.

How do I enforce a policy on lpop? +

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

lpop is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit lpop? +

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

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

lpop 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 LPOP ON REDIS MCP SERVER DOES

// THE RISK

// HOW TO CONTROL LPOP

// EXPLORE