AI agents use external_squads_add_users to create or update resources in Remnawave — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Remnawave environment.
The tool adds (creates) user associations to a squad, which modifies state but is reversible through removal. Within the context of a VPN panel administration server, adding users to squads is a Write-category action. Severity is medium because misconfiguration could grant inappropriate VPN access or permissions to users, but the damage is contained to squad membership and can be undone.
From the tool's definition Tool name 'external_squads_add_users' and description 'Add users to an external squad' indicate a modification operation that creates or updates squad membership. This is a reversible write operation, not a read, execute, destructive, or financial action.
Documented attack patterns abuse exactly the kind of access external_squads_add_users gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Remnawave, and nothing reaches the server without passing your rules. This is the rule we recommend for external_squads_add_users:
{
"version": "1",
"default": "deny",
"tools": {
"external_squads_add_users": {
"limits": [
{
"counter": "external_squads_add_users_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}external_squads_add_users 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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Add users to an external squad. It is categorised as a Write tool in the Remnawave MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Remnawave MCP server in PolicyLayer and add a rule for external_squads_add_users: 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 Remnawave. Nothing to install.
external_squads_add_users 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 external_squads_add_users 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 external_squads_add_users. 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.
external_squads_add_users is provided by the Remnawave MCP server (trackline/mcp-remnawave). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 153 Remnawave tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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153 Remnawave tools catalogued and risk-classified — across an index of 42,500+ MCP servers.