# get_computed_style

A read tool on the Playwright MCP Server MCP server.

Agent View of the PolicyLayer registry record for `get_computed_style`. HTML page: https://policylayer.com/tools/alexrwilliam-playwright-mcp-server/get-computed-style

## Facts

- Tool: `get_computed_style`
- Server: Playwright MCP Server (`alexrwilliam/playwright-mcp-server`) — https://policylayer.com/tools/alexrwilliam-playwright-mcp-server.md
- Homepage: https://github.com/alexrwilliam/playwright-mcp-server
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Allowed

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

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

## Why get_computed_style is rated Low

The tool retrieves computed CSS styles from the page, which is purely informational with no side effects. It fits the 'Read' category as it queries data (styles) without modifying state, executing arbitrary code, or performing destructive actions. The empty description increases confidence only moderately, but the name itself is sufficiently clear and unambiguous.

From the tool's own definition: "Tool name 'get_computed_style' indicates retrieval of CSS computed style information from DOM elements. This is a read-only operation that queries the browser's style state without modifying or executing code."

## Use case

AI agents call get_computed_style to retrieve information from Playwright MCP Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Playwright MCP Server:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_computed_style": {}
  }
}
```

## Other tools on Playwright MCP Server (66)

- `clear_cookies` — Destructive — https://policylayer.com/tools/alexrwilliam-playwright-mcp-server/clear-cookies.md
- `clear_network_logs` — Destructive — https://policylayer.com/tools/alexrwilliam-playwright-mcp-server/clear-network-logs.md
- `clear_storage` — Destructive — https://policylayer.com/tools/alexrwilliam-playwright-mcp-server/clear-storage.md
- `apply_antidetect_preset` — Execute — https://policylayer.com/tools/alexrwilliam-playwright-mcp-server/apply-antidetect-preset.md
- `check_checkbox` — Execute — https://policylayer.com/tools/alexrwilliam-playwright-mcp-server/check-checkbox.md
- `clear_text` — Execute — https://policylayer.com/tools/alexrwilliam-playwright-mcp-server/clear-text.md
- `click` — Execute — https://policylayer.com/tools/alexrwilliam-playwright-mcp-server/click.md
- `evaluate` — Execute — https://policylayer.com/tools/alexrwilliam-playwright-mcp-server/evaluate.md
- `fill` — Execute — https://policylayer.com/tools/alexrwilliam-playwright-mcp-server/fill.md
- `go_back` — Execute — https://policylayer.com/tools/alexrwilliam-playwright-mcp-server/go-back.md
- `go_forward` — Execute — https://policylayer.com/tools/alexrwilliam-playwright-mcp-server/go-forward.md
- `hover` — Execute — https://policylayer.com/tools/alexrwilliam-playwright-mcp-server/hover.md
- `intercept_route` — Execute — https://policylayer.com/tools/alexrwilliam-playwright-mcp-server/intercept-route.md
- `navigate` — Execute — https://policylayer.com/tools/alexrwilliam-playwright-mcp-server/navigate.md
- `press_key` — Execute — https://policylayer.com/tools/alexrwilliam-playwright-mcp-server/press-key.md
- `recreate_context` — Execute — https://policylayer.com/tools/alexrwilliam-playwright-mcp-server/recreate-context.md
- `reload` — Execute — https://policylayer.com/tools/alexrwilliam-playwright-mcp-server/reload.md
- `restart_browser` — Execute — https://policylayer.com/tools/alexrwilliam-playwright-mcp-server/restart-browser.md
- `scroll` — Execute — https://policylayer.com/tools/alexrwilliam-playwright-mcp-server/scroll.md
- `select_option` — Execute — https://policylayer.com/tools/alexrwilliam-playwright-mcp-server/select-option.md
- `set_extra_headers` — Execute — https://policylayer.com/tools/alexrwilliam-playwright-mcp-server/set-extra-headers.md
- `set_user_agent` — Execute — https://policylayer.com/tools/alexrwilliam-playwright-mcp-server/set-user-agent.md
- `set_viewport_size` — Execute — https://policylayer.com/tools/alexrwilliam-playwright-mcp-server/set-viewport-size.md
- `switch_page` — Execute — https://policylayer.com/tools/alexrwilliam-playwright-mcp-server/switch-page.md
- `switch_to_latest_page` — Execute — https://policylayer.com/tools/alexrwilliam-playwright-mcp-server/switch-to-latest-page.md
- `type_text` — Execute — https://policylayer.com/tools/alexrwilliam-playwright-mcp-server/type-text.md
- `uncheck_checkbox` — Execute — https://policylayer.com/tools/alexrwilliam-playwright-mcp-server/uncheck-checkbox.md
- `unroute_all` — Execute — https://policylayer.com/tools/alexrwilliam-playwright-mcp-server/unroute-all.md
- `upload_file` — Execute — https://policylayer.com/tools/alexrwilliam-playwright-mcp-server/upload-file.md
- `wait_for_element` — Execute — https://policylayer.com/tools/alexrwilliam-playwright-mcp-server/wait-for-element.md
- …and 36 more: https://policylayer.com/tools/alexrwilliam-playwright-mcp-server.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`

---

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