redis_type

THE RISK

Low Risk

Why redis_type needs a policy

This tool retrieves the type of a Redis key, which is a purely read operation equivalent to the Redis TYPE command. No data is modified, created, or deleted. Blast radius is minimal as it only exposes metadata about key types.

From the tool's definition 获取 Redis 键的数据类型 — 'get' (获取) the data type of a Redis key; read-only query with no side effects

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

POLICY

How to control redis_type

PolicyLayer is an MCP gateway — it sits between your AI agents and Db, and nothing reaches the server without passing your rules. This is the rule we recommend for redis_type:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "redis_type": {}
  }
}

redis_type is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Db — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Db tools

Destructive mongodb_delete_one 删除 MongoDB 集合中的单个文档 Destructive mysql_delete 执行 MySQL DELETE 删除操作。若服务启动时已预配置 MySQL，会直接使用默认连接。 Destructive redis_del 删除 Redis 键 Execute mysql_query 执行 MySQL SQL 语句（支持 SELECT、INSERT、UPDATE、DELETE 等所有 SQL 操作）。如果服务启动时已预配置 MySQL，本工具会直接复用默认连接， Execute set_security_mode 设置安全模式：read_only（只读模式）、restricted（限制模式）、full_access（完全开发模式） Write mongodb_connect 连接到 MongoDB 数据库 Write mongodb_insert_many 向 MongoDB 集合插入多个文档 Write mongodb_insert_one 向 MongoDB 集合插入单个文档

All 34 Db tools →

Read tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about redis_type

What does the redis_type tool do? +

获取 Redis 键的数据类型. It is categorised as a Read tool in the Db MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on redis_type? +

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

What risk level is redis_type? +

redis_type is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit redis_type? +

Yes. Add a rate_limit block to the redis_type 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_type completely? +

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

redis_type is provided by the Db MCP server (wannanbigpig/db-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Db tool call.

Start from Db, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →