# Chrome DevTools: tool descriptions scored

- tools/list taken: 2026-10-08 (UTC)
- From: [npm chrome-devtools-mcp@1.10.1](https://www.npmjs.com/package/chrome-devtools-mcp)
- Homepage: https://github.com/ChromeDevTools/chrome-devtools-mcp
- Scoring rules: v2
- Tools: 30
- Average: 45.1 / 100 (Cloudy)
- Near-identical pairs: 0

This page shows how Chrome DevTools's tool descriptions scored, the issues found and the names of its tools and parameters. The descriptions are the server's own: read them where the copy came from.

## Across the server

- Minor: 30 tools. Above 25, models start to tell tools apart less well.
- Minor: The server has no instructions. Say there, once, what the server is for and when to use it: Claude Code and Gemini CLI read the instructions before the tool descriptions.

## Tools

- `drag`: 31 / 100
  - Major: The description only restates the name (6 words).
  - Major: The description is too short (6 words).
  - Major: Says nothing about when to use it, or when not to.
  - Minor: The description mentions none of its 3 or more arguments.
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: pageId, from_uid, to_uid. Name the tool or the place that returns it, or models look it up first.
- `hover`: 31 / 100
  - Major: The description only restates the name (5 words).
  - Major: The description is too short (5 words).
  - Major: Says nothing about when to use it, or when not to.
  - Minor: The description mentions none of its 3 or more arguments.
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: pageId. Name the tool or the place that returns it, or models look it up first.
- `upload_file`: 31 / 100
  - Major: The description only restates the name (7 words).
  - Major: The description is too short (7 words).
  - Major: Says nothing about when to use it, or when not to.
  - Minor: The description mentions none of its 3 or more arguments.
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: pageId. Name the tool or the place that returns it, or models look it up first.
- `click`: 35 / 100
  - Major: The description is too short (5 words).
  - Major: Says nothing about when to use it, or when not to.
  - Minor: The description mentions none of its 3 or more arguments.
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: pageId. Name the tool or the place that returns it, or models look it up first.
- `type_text`: 36 / 100
  - Major: The description only restates the name (9 words).
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: pageId. Name the tool or the place that returns it, or models look it up first.
- `list_pages`: 38 / 100
  - Major: The description only restates the name (9 words).
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `take_screenshot`: 38 / 100
  - Major: The description only restates the name (8 words).
  - Major: Says nothing about when to use it, or when not to.
  - Minor: The description mentions none of its 3 or more arguments.
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: pageId. Name the tool or the place that returns it, or models look it up first.
- `handle_dialog`: 41 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: The description mentions none of its 3 or more arguments.
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: pageId. Name the tool or the place that returns it, or models look it up first.
- `navigate_page`: 41 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: pageId. Name the tool or the place that returns it, or models look it up first.
- `emulate`: 42 / 100
  - Major: The description is too short (7 words).
  - Major: Says nothing about when to use it, or when not to.
  - Minor: The description mentions none of its 3 or more arguments.
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: pageId. Name the tool or the place that returns it, or models look it up first.
- `list_console_messages`: 42 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: The description mentions none of its 3 or more arguments.
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: pageId. Name the tool or the place that returns it, or models look it up first.
- `new_page`: 42 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `performance_stop_trace`: 43 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: pageId. Name the tool or the place that returns it, or models look it up first.
- `select_page`: 43 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `wait_for`: 43 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: pageId. Name the tool or the place that returns it, or models look it up first.
- `close_page`: 44 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `get_console_message`: 44 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: pageId. Name the tool or the place that returns it, or models look it up first.
- `list_network_requests`: 44 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: The description mentions none of its 3 or more arguments.
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: pageId. Name the tool or the place that returns it, or models look it up first.
- `performance_analyze_insight`: 44 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: The description mentions none of its 3 or more arguments.
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: pageId, insightSetId. Name the tool or the place that returns it, or models look it up first.
- `resize_page`: 44 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: The description mentions none of its 3 or more arguments.
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: pageId. Name the tool or the place that returns it, or models look it up first.
- `take_heapsnapshot`: 44 / 100
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: pageId. Name the tool or the place that returns it, or models look it up first.
- `fill`: 47 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: The description mentions none of its 3 or more arguments.
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: pageId. Name the tool or the place that returns it, or models look it up first.
- `lighthouse_audit`: 50 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: The description mentions none of its 3 or more arguments.
  - Minor: Says nothing about what it returns.
- `evaluate_script`: 51 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Required identifiers whose description does not say where the value comes from: pageId. Name the tool or the place that returns it, or models look it up first.
- `get_network_request`: 54 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Required identifiers whose description does not say where the value comes from: pageId. Name the tool or the place that returns it, or models look it up first.
- `performance_start_trace`: 55 / 100
  - Minor: The description mentions none of its 3 or more arguments.
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: pageId. Name the tool or the place that returns it, or models look it up first.
- `get_css_styles`: 60 / 100
  - Minor: Required identifiers whose description does not say where the value comes from: pageId. Name the tool or the place that returns it, or models look it up first.
- `take_snapshot`: 60 / 100
  - Minor: The description mentions none of its 3 or more arguments.
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: pageId. Name the tool or the place that returns it, or models look it up first.
- `press_key`: 62 / 100
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: pageId. Name the tool or the place that returns it, or models look it up first.
- `fill_form`: 72 / 100
  - Minor: Says nothing about what it returns.
  - Minor: Required identifiers whose description does not say where the value comes from: pageId. Name the tool or the place that returns it, or models look it up first.

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