AI agents call get_parameter to retrieve information from Wago Plc without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and reads a single parameter value from a WAGO PLC without creating, modifying, or deleting data. Even though it operates on industrial control systems, the action itself is purely informational with no capability to alter system state, trigger operations, or cause damage. Therefore it is classified as Read with low severity.
From the tool's definition Tool name 'get_parameter' with description 'Read a single parameter value.' clearly indicates data retrieval with no modification. The phrase 'Resolves enum values to human-readable labels' confirms it transforms existing data for display without side effects.
Attacks that exploit this kind of access
Read a single parameter value. Resolves enum values to human-readable labels. It is categorised as a Read tool in the Wago Plc MCP Server, which means it retrieves data without modifying state.
Register the Wago Plc MCP server in PolicyLayer and add a rule for get_parameter: 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 Wago Plc. Nothing to install.
get_parameter 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_parameter 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_parameter. 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_parameter is provided by the Wago Plc MCP server (wagoalex/wago-plc-mcp-server). 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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