Remove ranges from a group. Args: group_name: Name of the group range_ids: List of range IDs to remove Returns: Result of removing ranges
AI agents use remove_ranges_from_group to create or update resources in Ludus FastMCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Ludus FastMCP environment.
Removing ranges from a group is a reversible association change — the ranges themselves are not deleted, only their membership in the group is modified. This maps to Write rather than Destructive. Misuse could disrupt group-based access or configurations, hence medium severity.
From the tool's definition Remove ranges from a group
Documented attack patterns abuse exactly the kind of access remove_ranges_from_group gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Ludus FastMCP, and nothing reaches the server without passing your rules. This is the rule we recommend for remove_ranges_from_group:
{
"version": "1",
"default": "deny",
"tools": {
"remove_ranges_from_group": {
"limits": [
{
"counter": "remove_ranges_from_group_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}remove_ranges_from_group 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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Remove ranges from a group. Args: group_name: Name of the group range_ids: List of range IDs to remove Returns: Result of removing ranges. It is categorised as a Write tool in the Ludus FastMCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Ludus Fast MCP server in PolicyLayer and add a rule for remove_ranges_from_group: 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 Ludus FastMCP. Nothing to install.
remove_ranges_from_group 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 remove_ranges_from_group 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 remove_ranges_from_group. 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.
remove_ranges_from_group is provided by the Ludus Fast MCP server (tjnull/ludus-fastmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 201 Ludus FastMCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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201 Ludus FastMCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.