Get the value of a field in a Redis hash. Args: name: The Redis hash key. key: The field name inside the hash. Returns: The field value or an error message.
AI agents call hget 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.
hget retrieves data from Redis without side effects or mutations. It is a straightforward read operation that queries existing data, consistent with the Read category definition (retrieves or queries data; no side effects). The low severity reflects minimal blast radius—retrieving values poses no risk to data integrity or system operations.
From the tool's definition Tool description states 'Get the value of a field in a Redis hash' with return value being 'The field value'. The arguments are the hash key and field name for retrieval only, with no modification capabilities.
Documented attack patterns abuse exactly the kind of access hget 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 hget:
{
"version": "1",
"default": "deny",
"tools": {
"hget": {}
}
}hget is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get the value of a field in a Redis hash. Args: name: The Redis hash key. key: The field name inside the hash. Returns: The field value 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 hget: 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.
hget 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 hget 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 hget. 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.
hget 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.