AI agents call cache_delete_many to permanently remove resources in Awslabs Valkey — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
This tool performs irreversible deletion of cached data. While the blast radius is limited to cached values (rather than primary data stores), deletion operations cannot be undone and represent a destructive action. It is more severe than Write (which is reversible) but less severe than Critical since it only affects cache layers.
From the tool's definition Tool name 'cache_delete_many' and description 'Delete multiple values from the cache' indicate irreversible deletion of data from the ElastiCache/MemoryDB cache store.
Documented attack patterns abuse exactly the kind of access cache_delete_many gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Awslabs Valkey, and nothing reaches the server without passing your rules. This is the rule we recommend for cache_delete_many:
{
"version": "1",
"default": "deny",
"hide": [
"cache_delete_many"
]
}cache_delete_many disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.
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Delete multiple values from the cache. It is categorised as a Destructive tool in the Awslabs Valkey MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Awslabs Valkey MCP server in PolicyLayer and add a rule for cache_delete_many: 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 Awslabs Valkey. Nothing to install.
cache_delete_many 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 cache_delete_many 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 cache_delete_many. 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.
cache_delete_many is provided by the Awslabs Valkey MCP server (awslabs.valkey-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Awslabs Valkey, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
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