AI agents invoke sap_select_tab to trigger actions in MCP SAP GUI Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.
Selecting a tab in a SAP GUI tab strip triggers UI navigation and may load different views, execute screen transitions, or trigger SAP business logic. This is an interactive GUI action via the SAP GUI Scripting API, making it an Execute-category operation. Misuse could navigate to unintended screens or trigger unintended workflows, warranting medium severity.
From the tool's definition Select a tab in a tab strip control
Documented attack patterns abuse exactly the kind of access sap_select_tab gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and MCP SAP GUI Server, and nothing reaches the server without passing your rules. This is the rule we recommend for sap_select_tab:
{
"version": "1",
"default": "deny",
"tools": {
"sap_select_tab": {
"limits": [
{
"counter": "sap_select_tab_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
} sap_select_tab stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
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Select a tab in a tab strip control. It is categorised as a Execute tool in the MCP SAP GUI Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the MCP SAP GUI Server MCP server in PolicyLayer and add a rule for sap_select_tab: 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 MCP SAP GUI Server. Nothing to install.
sap_select_tab is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the sap_select_tab 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 sap_select_tab. 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.
sap_select_tab is provided by the MCP SAP GUI Server MCP server (kts982/mcp-sap-gui). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from MCP SAP GUI 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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57 MCP SAP GUI Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.