redis_zadd · Multi-Database MCP Server MCP: Risk & Policy

WHAT IT DOES

What redis_zadd does on Multi-Database MCP Server

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

WHY IT NEEDS A POLICY

Why redis_zadd needs a policy

redis_zadd creates or modifies data in Redis by adding members to a sorted set. This is a Write operation—it changes persistent state but remains reversible (members can be removed later). It is not Destructive because additions can be undone. It does not Execute arbitrary code, move money, or Read-only retrieve data.

From the tool's definition Tool name 'redis_zadd' and description 'Add one or more members to a sorted set' indicate data creation/modification. The description specifies it modifies Redis sorted set data structures by adding members, which is a reversible write operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

redis_zadd Rate-limited

redis_zadd 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_zadd": {
      "limits": [
        {
          "counter": "redis_zadd_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 Multi-Database MCP Server, so you can run agents against it safely.

FAQ

Questions about redis_zadd

What does the redis_zadd tool do? +

Add one or more members to a sorted set (requires FULL mode). It is categorised as a Write tool in the Multi-Database MCP Server 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_zadd? +

Register the Multi-Database MCP Server MCP server in PolicyLayer and add a rule for redis_zadd: 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 Multi-Database MCP Server. Nothing to install.

What risk level is redis_zadd? +

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

Can I rate-limit redis_zadd? +

Yes. Add a rate_limit block to the redis_zadd 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_zadd completely? +

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

redis_zadd is provided by the Multi-Database MCP Server MCP server (nam088/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.