Update the IP allowlist for a SkySQL database instance with the current IP
AI agents use update_ip_allowlist to create or update resources in Skysql — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Skysql environment.
This tool modifies (writes) the IP allowlist configuration of a database instance, which controls network access permissions. It is reversible and does not delete or destroy data. While it affects security posture and could grant/revoke access, it is a configuration change rather than an Execute operation (which would run code/commands) or Destructive operation (which would be irreversible).
From the tool's definition Tool description states 'Update the IP allowlist' which modifies network access configuration for a database instance. The word 'Update' indicates a reversible write operation that changes existing security settings.
Documented attack patterns abuse exactly the kind of access update_ip_allowlist gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Skysql, and nothing reaches the server without passing your rules. This is the rule we recommend for update_ip_allowlist:
{
"version": "1",
"default": "deny",
"tools": {
"update_ip_allowlist": {
"limits": [
{
"counter": "update_ip_allowlist_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}update_ip_allowlist stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
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Update the IP allowlist for a SkySQL database instance with the current IP. It is categorised as a Write tool in the Skysql MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Skysql MCP server in PolicyLayer and add a rule for update_ip_allowlist: 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 Skysql. Nothing to install.
update_ip_allowlist is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the update_ip_allowlist 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 update_ip_allowlist. 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.
update_ip_allowlist is provided by the Skysql MCP server (skysqlinc/skysql-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Skysql, 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.
8 Skysql tools catalogued and risk-classified — across an index of 43,000+ MCP servers.