Delete a field from a Redis hash. Args: name: The Redis hash key. key: The field name inside the hash. Returns: A success message or an error message.
AI agents call hdel to permanently remove resources in Redis MCP Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
This tool irreversibly deletes data from a Redis hash. While the blast radius is somewhat limited to a single field rather than an entire key or database, the deletion is permanent and unrecoverable. It is categorized as Destructive rather than Write because Write operations must be reversible, and deletion is not.
From the tool's definition The tool description explicitly states 'Delete a field from a Redis hash' - it performs an irreversible deletion operation using the hdel command, a standard Redis destructive command that removes data that cannot be recovered.
Documented attack patterns abuse exactly the kind of access hdel 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 hdel:
{
"version": "1",
"default": "deny",
"hide": [
"hdel"
]
}hdel disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.
Free to start. No card required.
Delete a field from a Redis hash. Args: name: The Redis hash key. key: The field name inside the hash. Returns: A success message or an error message. It is categorised as a Destructive tool in the Redis MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Redis MCP Server MCP server in PolicyLayer and add a rule for hdel: 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.
hdel is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the hdel 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 hdel. 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.
hdel 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.