clang_compile · Yaver MCP: Risk & Policy

WHAT IT DOES

What clang_compile does on Yaver

AI agents invoke clang_compile to trigger actions in Yaver. 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.

PARAMETERS

Parameter	Type	Required
`file`	string	Yes
`flags`	array	—
`output`	string	—

Parameters from the server's own tool schema.

WHY IT NEEDS A POLICY

Why clang_compile needs a policy

clang_compile triggers real processes with real consequences. An agent gone sideways doesn't fire it once — it starts dozens of builds, sends mass notifications, or burns through compute before anyone looks up.

Risk signalsAccepts file system path (file)

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

clang_compile Rate-limited

clang_compile 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "clang_compile": {
      "limits": [
        {
          "counter": "clang_compile_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about clang_compile

What does the clang_compile tool do? +

Compile C/C++ with Clang. It is categorised as a Execute tool in the Yaver MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

What parameters does clang_compile accept? +

clang_compile accepts 3 parameters: file, flags, output. Required: file. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on clang_compile? +

Register the Yaver MCP server in PolicyLayer and add a rule for clang_compile: 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 Yaver. Nothing to install.

What risk level is clang_compile? +

clang_compile is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit clang_compile? +

Yes. Add a rate_limit block to the clang_compile 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 clang_compile completely? +

Set action: deny in the PolicyLayer policy for clang_compile. 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 clang_compile? +

clang_compile is provided by the Yaver MCP server (yaver-cli). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.