AI agents call list_vas_products to retrieve information from SIMcloud without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a passive lookup/listing of available VAS (Value Added Services) voucher products and their amounts. It has no side effects, does not create orders, does not move money, and does not execute any operations. It is purely informational, similar to browsing a product catalog.
From the tool's definition Tool name 'list_vas_products' and description 'Lists active SIMcloud VAS voucher products and available amounts' indicate a read-only query operation that retrieves product information without modifying or executing any transactions.
Attacks that exploit this kind of access
Lists active SIMcloud VAS voucher products and available amounts. It is categorised as a Read tool in the SIMcloud MCP Server, which means it retrieves data without modifying state.
Register the SIMcloud MCP server in PolicyLayer and add a rule for list_vas_products: 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 SIMcloud. Nothing to install.
list_vas_products 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_vas_products 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_vas_products. 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_vas_products is provided by the SIMcloud MCP server (https://simcloud.co.za/api/mcp.php). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
list_vas_products is one line of SIMcloud's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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