AI agents call get_codelist 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 static reference data from the CDISC Library API—specifically controlled terminology definitions used in clinical research standards. It performs a query/fetch operation with no side effects, data modification, or external command execution. The severity is low because accessing standard definitions poses minimal security risk.
From the tool's definition Tool name 'get_codelist' and description 'Get a specific Controlled Terminology codelist definition' indicate retrieval of standards reference data without modification.
Attacks that exploit this kind of access
Get a specific Controlled Terminology codelist definition. 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 get_codelist: 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.
get_codelist 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 get_codelist 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 get_codelist. 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.
get_codelist 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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