Get range of elements from a list
AI agents call redis_lrange to retrieve information from Mcp Database without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
LRANGE is a Redis command that queries and returns a subset of elements from a list by index range. It has no side effects—it does not create, modify, delete, or execute code. The server description mentions 'configurable read-only security,' and this tool exemplifies that read-only pattern. The blast radius of misuse is minimal; an agent could only retrieve data it has access to.
From the tool's definition Tool name 'redis_lrange' and description 'Get range of elements from a list' indicate a read-only operation that retrieves data from a Redis list without modifying it.
Attacks that exploit this kind of access
Get range of elements from a list. It is categorised as a Read tool in the Mcp Database MCP Server, which means it retrieves data without modifying state.
Register the Mcp Database MCP server in PolicyLayer and add a rule for redis_lrange: 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 Mcp Database. Nothing to install.
redis_lrange 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_lrange 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_lrange. 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_lrange is provided by the Mcp Database MCP server (nam088/mcp-database-server). 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.
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