bazel_macos_build
Build a Bazel macOS target (macos_application, macos_bundle, macos_command_line_application, etc.).
This record as markdown: /tools/xcodebazelmcp-xcodebazelmcp/bazel-macos-build.md
What bazel_macos_build does on XcodeBazelMCP
AI agents invoke bazel_macos_build 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.
Why bazel_macos_build is rated High
The tool executes a build process for macOS applications and bundles, which invokes external build tools (Bazel compiler toolchain) and produces compiled artifacts. While the build itself is typically deterministic, a misconfigured AI agent could target unintended build artifacts, corrupt build outputs, or trigger resource-intensive builds.
From the tool's definition Tool description states it 'Build[s] a Bazel macOS target', which involves compilation and linking of executable code.
Attacks that exploit this kind of access
The rule that runs bazel_macos_build 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_build, this is the rule to start with:
bazel_macos_build 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.
The button opens the PolicyLayer dashboard: create your workspace, connect XcodeBazelMCP, apply this rule, and every bazel_macos_build call is checked against it from then on.
Questions about bazel_macos_build
Build a Bazel macOS target (macos_application, macos_bundle, macos_command_line_application, etc.). 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.
Register the XcodeBazel MCP server in PolicyLayer and add a rule for bazel_macos_build: 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.
bazel_macos_build 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 bazel_macos_build 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 bazel_macos_build. 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.
bazel_macos_build 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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