AI agents call string_get to retrieve information from Redis MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves string values from Redis without modifying, deleting, or executing operations. It is a simple query operation on stored data. Severity is low because reading data has minimal blast radius unless the data itself is sensitive, but the tool's action is benign.
From the tool's definition Tool name 'string_get' and description '获取字符串值' (Chinese: 'get string value') indicate a retrieval operation with no side effects. Consistent with Read category operations like 'get' and 'fetch'.
Attacks that exploit this kind of access
获取字符串值. It is categorised as a Read tool in the Redis MCP MCP Server, which means it retrieves data without modifying state.
Register the Redis MCP server in PolicyLayer and add a rule for string_get: 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 Redis MCP. Nothing to install.
string_get 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 string_get 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 string_get. 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.
string_get is provided by the Redis MCP server (pickstar-2002/redis-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
Teams ship this data inside their own products. See what a licence covers →