扫描当前 Redis 数据库并返回内存占用最高的键
AI agents call redis_top_memory_keys to retrieve information from Db without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a scan/read operation on Redis to retrieve memory usage information about keys. It only reads and returns data without modifying anything. Severity is medium because scanning a full Redis database can be resource-intensive and may expose sensitive key names and memory layout information to an attacker.
From the tool's definition 扫描当前 Redis 数据库并返回内存占用最高的键 (Scans the current Redis database and returns the keys with highest memory usage)
Documented attack patterns abuse exactly the kind of access redis_top_memory_keys gives an agent:
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_top_memory_keys:
{
"version": "1",
"default": "deny",
"tools": {
"redis_top_memory_keys": {}
}
}redis_top_memory_keys is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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扫描当前 Redis 数据库并返回内存占用最高的键. It is categorised as a Read tool in the Db MCP Server, which means it retrieves data without modifying state.
Register the Db MCP server in PolicyLayer and add a rule for redis_top_memory_keys: 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.
redis_top_memory_keys is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the redis_top_memory_keys 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.
Set action: deny in the PolicyLayer policy for redis_top_memory_keys. 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.
redis_top_memory_keys 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.
Start from Db, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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34 Db tools catalogued and risk-classified — across an index of 43,000+ MCP servers.