flexsim_set_node_value · FlexSim MCP Server MCP

WHAT IT DOES

What flexsim_set_node_value does on FlexSim MCP Server

AI agents use flexsim_set_node_value to create or update resources in FlexSim MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your FlexSim MCP Server environment.

WHY IT NEEDS A POLICY

Why flexsim_set_node_value needs a policy

The tool creates or modifies data within the FlexSim model tree (reversible operation). While not destructive (data is not deleted), it is clearly a write operation that changes model state. Severity is high because modifying simulation parameters in a digital twin controlling manufacturing/warehouse operations could significantly impact analysis results and business decisions based on those simulations.

From the tool's definition Tool name 'flexsim_set_node_value' and description 'Set value in FlexSim tree node' indicate modification of simulation model parameters. This modifies model state rather than deleting data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

flexsim_set_node_value Rate-limited

flexsim_set_node_value stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "flexsim_set_node_value": {
      "limits": [
        {
          "counter": "flexsim_set_node_value_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches FlexSim MCP Server, so you can run agents against it safely.

FAQ

Questions about flexsim_set_node_value

What does the flexsim_set_node_value tool do? +

Set value in FlexSim tree node. It is categorised as a Write tool in the FlexSim MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on flexsim_set_node_value? +

Register the FlexSim MCP Server MCP server in PolicyLayer and add a rule for flexsim_set_node_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 FlexSim MCP Server. Nothing to install.

What risk level is flexsim_set_node_value? +

flexsim_set_node_value is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit flexsim_set_node_value? +

Yes. Add a rate_limit block to the flexsim_set_node_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.

How do I block flexsim_set_node_value completely? +

Set action: deny in the PolicyLayer policy for flexsim_set_node_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.

What MCP server provides flexsim_set_node_value? +

flexsim_set_node_value is provided by the FlexSim MCP Server MCP server (sethgame/mcp_flexsim). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.