AI agents call rucio_list_subscription_rules to retrieve information from Rucio without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The 'list' verb strongly suggests this is a read-only operation that retrieves or enumerates subscription rules from the Rucio system. Even without a description, the naming pattern aligns with query/list operations common in data management systems. No evidence suggests creation, modification, deletion, or execution of arbitrary operations.
From the tool's definition Tool name contains 'list' which indicates data retrieval operation. Description is empty, limiting confidence. 'subscription_rules' suggests querying existing subscription rule configurations rather than modifying them.
Attacks that exploit this kind of access
rucio_list_subscription_rules. It is categorised as a Read tool in the Rucio MCP Server, which means it retrieves data without modifying state.
Register the Rucio MCP server in PolicyLayer and add a rule for rucio_list_subscription_rules: 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 Rucio. Nothing to install.
rucio_list_subscription_rules is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the rucio_list_subscription_rules 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 rucio_list_subscription_rules. 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.
rucio_list_subscription_rules is provided by the Rucio MCP server (kratsg/rucio-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
Teams ship this data inside their own products. See what a licence covers →