Run an Ansys Fluent journal directly with fluent.exe.
AI agents invoke run_fluent_journal to trigger actions in Ansys Workbench. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.
This tool triggers execution of Ansys Fluent simulations via journal files, which are scripts that can perform arbitrary computational operations, modify simulation parameters, and generate results files. The execution is not a simple read operation, nor does it primarily create/modify data reversibly (it runs simulations whose results depend on complex inputs).
From the tool's definition Tool description states 'Run an Ansys Fluent journal directly with fluent.exe' - this executes external code/commands through Fluent's journal system, whose effects depend on the journal contents provided as arguments.
Documented attack patterns abuse exactly the kind of access run_fluent_journal gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Ansys Workbench, and nothing reaches the server without passing your rules. This is the rule we recommend for run_fluent_journal:
{
"version": "1",
"default": "deny",
"tools": {
"run_fluent_journal": {
"limits": [
{
"counter": "run_fluent_journal_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}run_fluent_journal stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Run an Ansys Fluent journal directly with fluent.exe. It is categorised as a Execute tool in the Ansys Workbench MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Ansys Workbench MCP server in PolicyLayer and add a rule for run_fluent_journal: 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 Ansys Workbench. Nothing to install.
run_fluent_journal is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the run_fluent_journal 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 run_fluent_journal. 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.
run_fluent_journal is provided by the Ansys Workbench MCP server (hongwenwang36-eng/ansys-workbench-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Ansys Workbench, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
29 Ansys Workbench tools catalogued and risk-classified — across an index of 43,000+ MCP servers.