获取指定变量的详细信息，包括数据类型、核心属性(Req/Exp/Perm)、角色等。\n\n
AI agents call get_variable to retrieve information from CDISC Library MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and returns metadata about variables in clinical data standards without modifying, executing, or deleting anything. It is a straightforward Read operation with no side effects. Low severity due to the non-sensitive nature of accessing standard definitions and metadata in a clinical standards library.
From the tool's definition Tool name 'get_variable' and description indicate retrieval of detailed information about a specified variable, including data type, core attributes (Req/Exp/Perm), and role.
Attacks that exploit this kind of access
获取指定变量的详细信息，包括数据类型、核心属性(Req/Exp/Perm)、角色等。\n\n. It is categorised as a Read tool in the CDISC Library MCP Server MCP Server, which means it retrieves data without modifying state.
Register the CDISC Library MCP Server MCP server in PolicyLayer and add a rule for get_variable: 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 Library MCP Server. Nothing to install.
get_variable 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_variable 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_variable. 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_variable is provided by the CDISC Library MCP Server MCP server (whereayan/cdisc-library-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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