get_submodel_element_value
AI agents call get_submodel_element_value to retrieve information from Aas without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves the value of a Submodel Element from an Asset Administration Shell via the BaSyx REST API. There is no indication it modifies, deletes, or executes code—it only returns data. The empty description reduces confidence slightly, but the naming convention and server context strongly indicate a read operation with minimal blast radius.
From the tool's definition Tool name 'get_submodel_element_value' follows the 'get_*' pattern, which is a READ operation. The method retrieves a value without modifying state.
Documented attack patterns abuse exactly the kind of access get_submodel_element_value gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Aas, and nothing reaches the server without passing your rules. This is the rule we recommend for get_submodel_element_value:
{
"version": "1",
"default": "deny",
"tools": {
"get_submodel_element_value": {}
}
}get_submodel_element_value is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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get_submodel_element_value. It is categorised as a Read tool in the Aas MCP Server, which means it retrieves data without modifying state.
Register the Aas MCP server in PolicyLayer and add a rule for get_submodel_element_value: 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 Aas. Nothing to install.
get_submodel_element_value 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_submodel_element_value 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_submodel_element_value. 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_submodel_element_value is provided by the Aas MCP server (smartfactory-kl/aas-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Aas, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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25 Aas tools catalogued and risk-classified — across an index of 43,000+ MCP servers.