AI agents call rucio_list_subscriptions 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_' prefix and absence of mutation verbs (create, update, delete, approve, deny) indicate this retrieves subscription data without side effects. In Rucio, subscriptions define rules for automatic data transfer; listing them is a query operation. Confidence is slightly reduced due to empty description, but the naming pattern and sibling tool context strongly support the Read categorization.
From the tool's definition Tool name 'rucio_list_subscriptions' indicates a listing operation. The verb 'list' combined with 'subscriptions' (a data entity in Rucio data management) strongly suggests querying or retrieving subscription information without modification.
Attacks that exploit this kind of access
rucio_list_subscriptions. 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_subscriptions: 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_subscriptions 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_subscriptions 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_subscriptions. 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_subscriptions 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.
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