List CAS libraries (caslibs) available on a CAS server.
AI agents call list_caslibs to retrieve information from SAS 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 metadata about available CAS libraries without creating, modifying, executing, or deleting anything. It has minimal blast radius—an AI agent misuse would result only in unauthorized information disclosure about library availability, not data manipulation or code execution. Confidence is high because the name and description clearly indicate a listing/query operation typical of Read category tools.
From the tool's definition Tool name 'list_caslibs' and description 'List CAS libraries (caslibs) available on a CAS server' indicate a query/retrieval operation with no modification or execution of code. The action is to enumerate available libraries, which is a read-only operation.
Documented attack patterns abuse exactly the kind of access list_caslibs gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and SAS MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for list_caslibs:
{
"version": "1",
"default": "deny",
"tools": {
"list_caslibs": {}
}
}list_caslibs is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List CAS libraries (caslibs) available on a CAS server. It is categorised as a Read tool in the SAS MCP Server MCP Server, which means it retrieves data without modifying state.
Register the SAS MCP Server MCP server in PolicyLayer and add a rule for list_caslibs: 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 SAS MCP Server. Nothing to install.
list_caslibs 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_caslibs 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_caslibs. 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_caslibs is provided by the SAS MCP Server MCP server (sassoftware/sas-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from SAS MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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27 SAS MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.