Passwords must fulfill specific criteria to be secure. The Api.GetPasswordPolicy method provides you with the password policy of the CPU. The password policy is a global setting in the STEP 7 project and applies for all users of the Web server. The method does not contain any information on the e...
AI agents call Api-GetPasswordPolicy to retrieve information from ThinkPLC-MCP 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 password policy settings from the PLC controller. It performs a read-only operation with no side effects, data modification, or execution of commands. The blast radius of misuse is low—knowledge of password policy alone does not enable unauthorized access or control of the PLC, though it could inform an attacker about security constraints. It is least severe among the risk categories.
From the tool's definition The tool name 'Api-GetPasswordPolicy' and description 'provides you with the password policy of the CPU' indicate a retrieval operation.
Risk signalsBulk/mass operation — affects multiple targets
Documented attack patterns abuse exactly the kind of access Api-GetPasswordPolicy gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and ThinkPLC-MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for Api-GetPasswordPolicy:
{
"version": "1",
"default": "deny",
"tools": {
"Api-GetPasswordPolicy": {}
}
}Api-GetPasswordPolicy is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Passwords must fulfill specific criteria to be secure. The Api.GetPasswordPolicy method provides you with the password policy of the CPU. The password policy is a global setting in the STEP 7 project and applies for all users of the Web server. The method does not contain any information on the expiration of the password. Any user, including unauthenticated users (. It is categorised as a Read tool in the ThinkPLC-MCP MCP Server, which means it retrieves data without modifying state.
Register the ThinkPLC- MCP server in PolicyLayer and add a rule for Api-GetPasswordPolicy: 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 ThinkPLC-MCP. Nothing to install.
Api-GetPasswordPolicy 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 Api-GetPasswordPolicy 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 Api-GetPasswordPolicy. 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.
Api-GetPasswordPolicy is provided by the ThinkPLC- MCP server (mrwan84/thinkplc-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from ThinkPLC-MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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23 ThinkPLC-MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.