Grant access to range for another user. Args: target_user_id: User ID to grant access to permissions: List of permissions to grant (read, write, admin) user_id: Optional user ID (admin only) Returns: Grant result
AI agents use grant_range_access 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.
This is a Write operation because it creates or modifies access control permissions for another user reversibly. While permissions changes have significant security implications (users gaining access to sensitive cyber range environments), the action is reversible—permissions can be revoked.
From the tool's definition Tool grants access permissions to another user for a cyber range environment. The description explicitly states it grants 'read, write, admin' permissions, which modifies user access control and authorization states reversibly.
Risk signalsAdmin/system-level operation
Documented attack patterns abuse exactly the kind of access grant_range_access 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 grant_range_access:
{
"version": "1",
"default": "deny",
"tools": {
"grant_range_access": {
"limits": [
{
"counter": "grant_range_access_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}grant_range_access 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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Grant access to range for another user. Args: target_user_id: User ID to grant access to permissions: List of permissions to grant (read, write, admin) user_id: Optional user ID (admin only) Returns: Grant result. 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 grant_range_access: 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.
grant_range_access 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 grant_range_access 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 grant_range_access. 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.
grant_range_access 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.
Free to start. No card required.
201 Ludus FastMCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.