redis_sorted_set_add · RedisNexus MCP: Risk & Policy

WHAT IT DOES

What redis_sorted_set_add does on RedisNexus

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

WHY IT NEEDS A POLICY

Why redis_sorted_set_add needs a policy

This tool creates or modifies data in Redis sorted sets by adding members with scores. This is reversible (members can be removed or scores updated), making it a Write operation rather than Destructive. Severity is medium because misuse could corrupt application state (e.g., leaderboard data), but impact is limited to a single data structure and can be remediated.

From the tool's definition Tool name 'redis_sorted_set_add' and description 'Add members with scores to a Redis Sorted Set' indicate data creation/modification operations.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

redis_sorted_set_add Rate-limited

redis_sorted_set_add 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": {
    "redis_sorted_set_add": {
      "limits": [
        {
          "counter": "redis_sorted_set_add_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 RedisNexus, so you can run agents against it safely.

FAQ

Questions about redis_sorted_set_add

What does the redis_sorted_set_add tool do? +

Add members with scores to a Redis Sorted Set. Ideal for leaderboards,. It is categorised as a Write tool in the RedisNexus MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on redis_sorted_set_add? +

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

What risk level is redis_sorted_set_add? +

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

Can I rate-limit redis_sorted_set_add? +

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

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

redis_sorted_set_add is provided by the RedisNexus MCP server (rajkumar-madhu/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.