Build an O3DE project using CMake.
AI agents invoke build_project to trigger actions in O3de. 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.
Building a project invokes CMake and the compiler toolchain, which executes code and external operations whose effects depend on project configuration and arguments. While builds are common and typically reversible, they consume resources, may modify build artifacts, and could have side effects if the build process contains custom scripts or hooks.
From the tool's definition Tool name 'build_project' combined with description 'Build an O3DE project using CMake' indicates execution of CMake build commands, which triggers external build operations and compilation workflows.
Documented attack patterns abuse exactly the kind of access build_project gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and O3de, and nothing reaches the server without passing your rules. This is the rule we recommend for build_project:
{
"version": "1",
"default": "deny",
"tools": {
"build_project": {
"limits": [
{
"counter": "build_project_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}build_project 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.
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Build an O3DE project using CMake. It is categorised as a Execute tool in the O3de MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the O3de MCP server in PolicyLayer and add a rule for build_project: 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 O3de. Nothing to install.
build_project 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 build_project 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 build_project. 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.
build_project is provided by the O3de MCP server (nickschuetz/o3de-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from O3de, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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30 O3de tools catalogued and risk-classified — across an index of 43,000+ MCP servers.