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

WHAT IT DOES

What redis_incr does on Multi-Database MCP Server

AI agents use redis_incr 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_incr needs a policy

This tool modifies an existing Redis key's value by incrementing it. This is a reversible write operation (the value can be decremented back), not destructive, not financial, and not executing arbitrary code. The 'FULL mode' requirement indicates it has write-level access control. Misuse could cause data corruption or counter drift but is not irreversible.

From the tool's definition Increment the integer value of a key by 1 (requires FULL mode)

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

redis_incr Rate-limited

redis_incr 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_incr": {
      "limits": [
        {
          "counter": "redis_incr_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_incr

What does the redis_incr tool do? +

Increment the integer value of a key by 1 (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_incr? +

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

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

Can I rate-limit redis_incr? +

Yes. Add a rate_limit block to the redis_incr 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_incr completely? +

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

redis_incr 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.