AI agents call list_ct_packages to retrieve information from Cdisc without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and lists metadata about CDISC Controlled Terminology packages. It performs a straightforward query operation that returns reference data without creating, modifying, deleting, or executing any actions. The read-only nature, combined with low blast radius (listing public standards information) justifies the 'Read' category and 'low' severity.
From the tool's definition Tool name 'list_ct_packages' and description 'List all available CDISC Controlled Terminology packages with release dates' indicate a retrieval operation with no parameters that modify state.
Attacks that exploit this kind of access
List all available CDISC Controlled Terminology packages with release dates. It is categorised as a Read tool in the Cdisc MCP Server, which means it retrieves data without modifying state.
Register the Cdisc MCP server in PolicyLayer and add a rule for list_ct_packages: 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 Cdisc. Nothing to install.
list_ct_packages 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 list_ct_packages 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 list_ct_packages. 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.
list_ct_packages is provided by the Cdisc MCP server (teninq/cdisc-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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