bazel_macos_run

Build and launch a Bazel macOS application locally via

SERVERXcodeBazelMCP SOURCExcodebazelmcp/xcodebazelmcp

High RISK CLASS

Category Execute

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/xcodebazelmcp-xcodebazelmcp/bazel-macos-run.md

WHAT IT DOES

What bazel_macos_run does on XcodeBazelMCP

AI agents invoke bazel_macos_run to trigger actions in XcodeBazelMCP. 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.

RISK

Why bazel_macos_run is rated High

This tool executes code by building and launching macOS applications, which is a code execution action. The blast radius is high because a malicious agent could build and run arbitrary applications with the privileges of the user running the tool, potentially leading to system compromise, data exfiltration, or other harmful side effects.

From the tool's definition Tool name 'bazel_macos_run' and description 'Build and launch a Bazel macOS application locally' indicate the tool builds and executes arbitrary macOS applications.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs bazel_macos_run safely

PolicyLayer is an MCP gateway: it sits between your AI agents and XcodeBazelMCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For bazel_macos_run, this is the rule to start with:

bazel_macos_run Rate-limited

bazel_macos_run 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": {
    "bazel_macos_run": {
      "limits": [
        {
          "counter": "bazel_macos_run_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect XcodeBazelMCP, apply this rule, and every bazel_macos_run call is checked against it from then on.

FAQ

Questions about bazel_macos_run

What does the bazel_macos_run tool do? +

Build and launch a Bazel macOS application locally via. It is categorised as a Execute tool in the XcodeBazelMCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on bazel_macos_run? +

Register the XcodeBazel MCP server in PolicyLayer and add a rule for bazel_macos_run: 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 XcodeBazelMCP. Nothing to install.

What risk level is bazel_macos_run? +

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

Can I rate-limit bazel_macos_run? +

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

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

bazel_macos_run is provided by the XcodeBazel MCP server (xcodebazelmcp/xcodebazelmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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