Retrieve a range of members from a Redis sorted set. Args: key (str): The sorted set key. start (int): The starting index. end (int): The ending index. with_scores (bool, optional): Whether to include scores in the result. Returns: str: The sorted set members in the given range or an error message.
AI agents call zrange to retrieve information from Redis MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only reads data from a Redis sorted set by index range. It has no side effects, does not modify any data, and simply returns members (optionally with scores). Pure read operation with minimal blast radius.
From the tool's definition Retrieve a range of members from a Redis sorted set
Documented attack patterns abuse exactly the kind of access zrange gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Redis MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for zrange:
{
"version": "1",
"default": "deny",
"tools": {
"zrange": {}
}
}zrange is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Retrieve a range of members from a Redis sorted set. Args: key (str): The sorted set key. start (int): The starting index. end (int): The ending index. with_scores (bool, optional): Whether to include scores in the result. Returns: str: The sorted set members in the given range or an error message. It is categorised as a Read tool in the Redis MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Redis MCP Server MCP server in PolicyLayer and add a rule for zrange: 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 Server. Nothing to install.
zrange 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 zrange 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 zrange. 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.
zrange is provided by the Redis MCP Server MCP server (redis/mcp-redis). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 53 Redis MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
53 Redis MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.