Return known warnings for selected software.
AI agents call simulation_guard to retrieve information from Photonics Simulation MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool retrieves and returns information about known warnings and issues for simulation software. It has no side effects, does not execute code, does not modify data, and does not trigger external operations. This is a clear Read category operation consistent with sibling tools like get_lumerical_bugs, get_hfss_bugs, and get_rule which query knowledge bases.
From the tool's definition Tool description states 'Return known warnings for selected software' — this is a retrieval/query operation that fetches and presents pre-existing knowledge without modifying, executing, or affecting any systems.
Attacks that exploit this kind of access
Return known warnings for selected software. It is categorised as a Read tool in the Photonics Simulation MCP MCP Server, which means it retrieves data without modifying state.
Register the Photonics Simulation MCP server in PolicyLayer and add a rule for simulation_guard: 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 Photonics Simulation MCP. Nothing to install.
simulation_guard 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 simulation_guard 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 simulation_guard. 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.
simulation_guard is provided by the Photonics Simulation MCP server (llldyyy/photonics-simulation-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
simulation_guard is one line of Photonics Simulation's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
Teams ship this data inside their own products. See what a licence covers →