feat: expose OpenClaw tools to ACPX

docs/tools/acp-agents.md

@@ -813,6 +813,23 @@ Security and trust notes:
 Custom `mcpServers` still work as before. The built-in plugin-tools bridge is an
 additional opt-in convenience, not a replacement for generic MCP server config.
 
+### OpenClaw tools MCP bridge
+
+By default, ACPX sessions also do **not** expose built-in OpenClaw tools through
+MCP. Enable the separate core-tools bridge when an ACP agent needs selected
+built-in tools such as `cron`:
+
+```bash
+openclaw config set plugins.entries.acpx.config.openClawToolsMcpBridge true
+```
+
+What this does:
+
+- Injects a built-in MCP server named `openclaw-tools` into ACPX session
+  bootstrap.
+- Exposes selected built-in OpenClaw tools. The initial server exposes `cron`.
+- Keeps core-tool exposure explicit and default-off.
+
 ### Runtime timeout configuration
 
 The bundled `acpx` plugin defaults embedded runtime turns to a 120-second