AI agents use superset_bulk_user_role_replace to create or update resources in MCP Superset — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your MCP Superset environment.
This tool modifies user-to-role mappings in bulk, which affects access control across an entire system. While not destructive (changes are reversible), it is a Write operation with high severity due to its potential blast radius: misconfigured bulk role replacements could grant unauthorized permissions to many users or revoke legitimate access, disrupting system security and user workflows.
From the tool's definition Tool name explicitly contains 'bulk_user_role_replace' which indicates mass modification of user role assignments. The 'replace' action suggests overwriting existing role mappings for multiple users.
Documented attack patterns abuse exactly the kind of access superset_bulk_user_role_replace gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and MCP Superset, and nothing reaches the server without passing your rules. This is the rule we recommend for superset_bulk_user_role_replace:
{
"version": "1",
"default": "deny",
"tools": {
"superset_bulk_user_role_replace": {
"limits": [
{
"counter": "superset_bulk_user_role_replace_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}superset_bulk_user_role_replace 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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superset_bulk_user_role_replace. It is categorised as a Write tool in the MCP Superset MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the MCP Superset MCP server in PolicyLayer and add a rule for superset_bulk_user_role_replace: 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 MCP Superset. Nothing to install.
superset_bulk_user_role_replace 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 superset_bulk_user_role_replace 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 superset_bulk_user_role_replace. 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.
superset_bulk_user_role_replace is provided by the MCP Superset MCP server (mcp-superset). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from MCP Superset, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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137 MCP Superset tools catalogued and risk-classified — across an index of 43,000+ MCP servers.