Api-GetQuantityStructures

THE RISK

Low Risk

Why Api-GetQuantityStructures needs a policy

This tool queries and returns structural metadata about the Web server without modifying any data, executing commands, or triggering external operations. It is a read-only diagnostic/informational operation. In the context of PLC controller interaction, retrieving structure information poses minimal risk as it does not affect system state, operations, or safety-critical functions.

From the tool's definition Tool name 'Api-GetQuantityStructures' and description 'returns different structure information of the Web server' indicate data retrieval with no modification or side effects.

Documented attack patterns abuse exactly the kind of access Api-GetQuantityStructures gives an agent:

POLICY

How to control Api-GetQuantityStructures

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-GetQuantityStructures:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "Api-GetQuantityStructures": {}
  }
}

Api-GetQuantityStructures is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register ThinkPLC-MCP — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

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EXPLORE

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Go deeper

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FAQ

Questions about Api-GetQuantityStructures

What does the Api-GetQuantityStructures tool do? +

The Api.GetQuantityStructures method returns different structure information of the Web server. It is categorised as a Read tool in the ThinkPLC-MCP MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on Api-GetQuantityStructures? +

Register the ThinkPLC- MCP server in PolicyLayer and add a rule for Api-GetQuantityStructures: 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.

What risk level is Api-GetQuantityStructures? +

Api-GetQuantityStructures is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit Api-GetQuantityStructures? +

Yes. Add a rate_limit block to the Api-GetQuantityStructures 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.

How do I block Api-GetQuantityStructures completely? +

Set action: deny in the PolicyLayer policy for Api-GetQuantityStructures. 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.

What MCP server provides Api-GetQuantityStructures? +

Api-GetQuantityStructures 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.

Enforce policy on every ThinkPLC-MCP tool call.

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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