Delete multiple values from the cache (alias for delete_many).
AI agents call cache_delete_multi to permanently remove resources in AWS Labs postgres MCP Server — 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 data from a cache store. Unlike Write operations that can be reversed, deletion cannot be undone. The plural scope ('multiple values') increases the blast radius. While cache data is typically less critical than primary databases, deleting cache entries can degrade system performance and cause data loss if the cache is the source of truth for any values.
From the tool's definition Tool name is 'cache_delete_multi' with description 'Delete multiple values from the cache (alias for delete_many)'. The verb 'delete' and explicit mention of deleting 'multiple values' clearly indicates irreversible removal of data.
Documented attack patterns abuse exactly the kind of access cache_delete_multi gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and AWS Labs postgres MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for cache_delete_multi:
{
"version": "1",
"default": "deny",
"hide": [
"cache_delete_multi"
]
}cache_delete_multi 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 (alias for delete_many). It is categorised as a Destructive tool in the AWS Labs postgres MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the AWS Labs postgres MCP Server MCP server in PolicyLayer and add a rule for cache_delete_multi: 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 AWS Labs postgres MCP Server. Nothing to install.
cache_delete_multi 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_multi 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_multi. 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_multi is provided by the AWS Labs postgres MCP Server MCP server (awslabs.postgres-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from AWS Labs postgres MCP Server, 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.
805 AWS Labs postgres MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.