# bazel_daemon_start

Start or ensure the per-workspace background daemon is running. The daemon exposes a coordination socket and tracks background-operation metadata for the workspace. Note: capture/recording/LLDB child processes currently run inside the MCP server process, not the daemon.

Agent View of the PolicyLayer registry record for `bazel_daemon_start`. HTML page: https://policylayer.com/tools/xcodebazelmcp-xcodebazelmcp/bazel-daemon-start

## Facts

- Tool: `bazel_daemon_start`
- Server: XcodeBazelMCP (`xcodebazelmcp/xcodebazelmcp`) — https://policylayer.com/tools/xcodebazelmcp-xcodebazelmcp.md
- Homepage: https://github.com/XcodeBazelMCP/XcodeBazelMCP
- Risk category: Execute (High risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Rate-limited

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "bazel_daemon_start",
    "arguments": {}
  }
}
```

## Why bazel_daemon_start is rated High

This tool launches a persistent background process (bazel_daemon) with system-level coordination capabilities (socket exposure, metadata tracking). While not directly destructive or financial, it executes a subprocess operation that affects the system state and could enable subsequent operations. Starting daemons without proper oversight risks unintended background activity, resource consumption, or security issues.

From the tool's own definition: "Tool starts a background daemon process that exposes a coordination socket and tracks workspace metadata. Triggering daemon startup constitutes executing an external operation whose effects depend on workspace state and daemon behavior."

## Use case

AI agents invoke bazel_daemon_start 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.

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches XcodeBazelMCP:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "bazel_daemon_start": {
      "limits": [
        {
          "counter": "bazel_daemon_start_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on XcodeBazelMCP (124)

- `bazel_ios_agent_debug_log_clear` — Destructive — https://policylayer.com/tools/xcodebazelmcp-xcodebazelmcp/bazel-ios-agent-debug-log-clear.md
- `bazel_ios_clean` — Destructive — https://policylayer.com/tools/xcodebazelmcp-xcodebazelmcp/bazel-ios-clean.md
- `bazel_ios_device_uninstall_app` — Destructive — https://policylayer.com/tools/xcodebazelmcp-xcodebazelmcp/bazel-ios-device-uninstall-app.md
- `bazel_ios_device_unpair` — Destructive — https://policylayer.com/tools/xcodebazelmcp-xcodebazelmcp/bazel-ios-device-unpair.md
- `bazel_ios_erase_simulator` — Destructive — https://policylayer.com/tools/xcodebazelmcp-xcodebazelmcp/bazel-ios-erase-simulator.md
- `bazel_ios_uninstall_app` — Destructive — https://policylayer.com/tools/xcodebazelmcp-xcodebazelmcp/bazel-ios-uninstall-app.md
- `swift_package_clean` — Destructive — https://policylayer.com/tools/xcodebazelmcp-xcodebazelmcp/swift-package-clean.md
- `bazel_daemon_stop` — Execute — https://policylayer.com/tools/xcodebazelmcp-xcodebazelmcp/bazel-daemon-stop.md
- `bazel_ios_agent_debug_repro` — Execute — https://policylayer.com/tools/xcodebazelmcp-xcodebazelmcp/bazel-ios-agent-debug-repro.md
- `bazel_ios_boot_simulator` — Execute — https://policylayer.com/tools/xcodebazelmcp-xcodebazelmcp/bazel-ios-boot-simulator.md
- `bazel_ios_build` — Execute — https://policylayer.com/tools/xcodebazelmcp-xcodebazelmcp/bazel-ios-build.md
- `bazel_ios_build_and_run` — Execute — https://policylayer.com/tools/xcodebazelmcp-xcodebazelmcp/bazel-ios-build-and-run.md
- `bazel_ios_device_build_and_run` — Execute — https://policylayer.com/tools/xcodebazelmcp-xcodebazelmcp/bazel-ios-device-build-and-run.md
- `bazel_ios_device_install_app` — Execute — https://policylayer.com/tools/xcodebazelmcp-xcodebazelmcp/bazel-ios-device-install-app.md
- `bazel_ios_device_launch_app` — Execute — https://policylayer.com/tools/xcodebazelmcp-xcodebazelmcp/bazel-ios-device-launch-app.md
- `bazel_ios_device_log_start` — Execute — https://policylayer.com/tools/xcodebazelmcp-xcodebazelmcp/bazel-ios-device-log-start.md
- `bazel_ios_device_log_stop` — Execute — https://policylayer.com/tools/xcodebazelmcp-xcodebazelmcp/bazel-ios-device-log-stop.md
- `bazel_ios_device_pair` — Execute — https://policylayer.com/tools/xcodebazelmcp-xcodebazelmcp/bazel-ios-device-pair.md
- `bazel_ios_device_stop_app` — Execute — https://policylayer.com/tools/xcodebazelmcp-xcodebazelmcp/bazel-ios-device-stop-app.md
- `bazel_ios_device_test` — Execute — https://policylayer.com/tools/xcodebazelmcp-xcodebazelmcp/bazel-ios-device-test.md
- `bazel_ios_discover_targets` — Execute — https://policylayer.com/tools/xcodebazelmcp-xcodebazelmcp/bazel-ios-discover-targets.md
- `bazel_ios_double_tap` — Execute — https://policylayer.com/tools/xcodebazelmcp-xcodebazelmcp/bazel-ios-double-tap.md
- `bazel_ios_drag` — Execute — https://policylayer.com/tools/xcodebazelmcp-xcodebazelmcp/bazel-ios-drag.md
- `bazel_ios_install_app` — Execute — https://policylayer.com/tools/xcodebazelmcp-xcodebazelmcp/bazel-ios-install-app.md
- `bazel_ios_key_press` — Execute — https://policylayer.com/tools/xcodebazelmcp-xcodebazelmcp/bazel-ios-key-press.md
- `bazel_ios_launch_app` — Execute — https://policylayer.com/tools/xcodebazelmcp-xcodebazelmcp/bazel-ios-launch-app.md
- `bazel_ios_lldb_attach` — Execute — https://policylayer.com/tools/xcodebazelmcp-xcodebazelmcp/bazel-ios-lldb-attach.md
- `bazel_ios_lldb_breakpoint` — Execute — https://policylayer.com/tools/xcodebazelmcp-xcodebazelmcp/bazel-ios-lldb-breakpoint.md
- `bazel_ios_lldb_command` — Execute — https://policylayer.com/tools/xcodebazelmcp-xcodebazelmcp/bazel-ios-lldb-command.md
- `bazel_ios_lldb_detach` — Execute — https://policylayer.com/tools/xcodebazelmcp-xcodebazelmcp/bazel-ios-lldb-detach.md
- …and 94 more: https://policylayer.com/tools/xcodebazelmcp-xcodebazelmcp.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

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Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=xcodebazelmcp-xcodebazelmcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/xcodebazelmcp-xcodebazelmcp