Update documentation

Author: Natallia Harshunova

README.md

@@ -616,11 +616,11 @@ The Chrome DevTools MCP server supports the following configuration option:
   - **Type:** array
 
 - **`--blocklist`**
-  URL patterns to block access to. Uses standard URLPattern API. Cannot be used with --blocklist
+  Restricts network access by blocking specified URL patterns (uses URLPattern API https://urlpattern.spec.whatwg.org/). Silently detaches from targets with blocked URLs upon connection, and blocks runtime requests (including navigations and subresources).
   - **Type:** array
 
 - **`--allowlist`**
-  URL patterns to allow access to (blocks everything else). Uses standard URLPattern API. Cannot be used with --blocklist.
+  Restricts network access by allowing only specified URL patterns (uses URLPattern API https://urlpattern.spec.whatwg.org/). Requires Chrome 149+. Silently detaches from targets with unallowed URLs upon connection, and blocks runtime requests (including navigations and subresources).
   - **Type:** array
 
 - **`--ignoreDefaultChromeArg`/ `--ignore-default-chrome-arg`**

src/bin/chrome-devtools-mcp-cli-options.ts

@@ -213,12 +213,13 @@ export const cliOptions = {
   blocklist: {
     type: 'array',
     describe:
-      'URL patterns to block access to. Uses standard URLPattern API. Cannot be used with --blocklist',
+      'Restricts network access by blocking specified URL patterns (uses https://urlpattern.spec.whatwg.org/). Silently detaches from targets with blocked URLs upon connection, and blocks runtime requests (including navigations and subresources).',
+    conflicts: ['allowlist'],
   },
   allowlist: {
     type: 'array',
     describe:
-      'URL patterns to allow access to (blocks everything else). Uses standard URLPattern API. Cannot be used with --blocklist.',
+      'Restricts network access by allowing only specified URL patterns (uses https://urlpattern.spec.whatwg.org/). Requires Chrome 149+. Silently detaches from targets with unallowed URLs upon connection, and blocks runtime requests (including navigations and subresources).',
     conflicts: ['blocklist'],
   },
   ignoreDefaultChromeArg: {