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

WHAT IT DOES

What redis_srem does on Multi-Database MCP Server

AI agents use redis_srem 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_srem needs a policy

This tool removes specific members from a Redis set. While it modifies data, it does not irreversibly destroy an entire structure — individual members can be re-added, making this a reversible write operation rather than a destructive one. The 'FULL mode' requirement indicates elevated permissions are needed, raising the severity to medium.

From the tool's definition Remove one or more members from a set (requires FULL mode)

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

redis_srem Rate-limited

redis_srem 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_srem": {
      "limits": [
        {
          "counter": "redis_srem_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_srem

What does the redis_srem tool do? +

Remove one or more members from a 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_srem? +

Register the Multi-Database MCP Server MCP server in PolicyLayer and add a rule for redis_srem: 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_srem? +

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

Can I rate-limit redis_srem? +

Yes. Add a rate_limit block to the redis_srem 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_srem completely? +

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

redis_srem 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.