Description of the bug
The "Other Common Errors" list in skills/troubleshooting/SKILL.md tells agents, for "Tool not found", to "check if they are using --slim which only enables navigation and screenshot tools". Slim mode exposes three tools, navigate, evaluate and screenshot, so the description omits script evaluation. evaluate was already part of slim mode when the skill was added. Observed on 1.10.1 and on main b2f522c.
Actual behavior
In both builds, tools/list under --slim returned exactly evaluate, navigate, screenshot. The skill says slim enables only navigation and screenshot tools.
Reproduction
Executed on macOS against the published 1.10.1 package and a local build of main b2f522c, with usage statistics and update checks disabled.
npm i --prefix /tmp/x chrome-devtools-mcp@1.10.1 @modelcontextprotocol/sdk.- Start
chrome-devtools-mcp --slim --headless --isolated --no-usage-statistics --no-performance-crux through an MCP stdio client (@modelcontextprotocol/sdk Client + StdioClientTransport) and call tools/list.
- Compare the tool names with
skills/troubleshooting/SKILL.md line 62.
Expectation
The skill's description of slim mode should match the slim tool set defined in docs/slim-tool-reference.md and src/tools/slim/tools.ts: navigate (Navigation automation), evaluate and screenshot (Debugging). evaluate has been in slim mode since --slim was introduced (#958), before the troubleshooting skill was added (#1083).
Chrome DevTools MCP version
1.10.1 (npm) and main b2f522c (local build)
Chrome version
154.0.8037.93 (stable, headless, isolated)
Node version
v24.21.0
Operating system
macOS
Evidence
- Expected source:
docs/slim-tool-reference.md and src/tools/slim/tools.ts at tag chrome-devtools-mcp-v1.10.1 and main b2f522c.
- Failure source:
skills/troubleshooting/SKILL.md:62 (identical in 1.10.1 and main b2f522c) compared with the tools/list result under Actual behavior.
- Evidence provenance: observed
- Local verification: reproduced
- Reproduction completeness: complete
Fix check
Failing now: the skill's slim description lists navigation and screenshot tools only, while tools/list under --slim returns evaluate, navigate and screenshot. Restored: the skill's description of slim mode matches the tools/list result under --slim. Control: the advice to check for --slim when a tool is not found stays intact.
Description of the bug
The "Other Common Errors" list in
skills/troubleshooting/SKILL.mdtells agents, for "Tool not found", to "check if they are using--slimwhich only enables navigation and screenshot tools". Slim mode exposes three tools,navigate,evaluateandscreenshot, so the description omits script evaluation.evaluatewas already part of slim mode when the skill was added. Observed on 1.10.1 and onmainb2f522c.Actual behavior
In both builds,
tools/listunder--slimreturned exactlyevaluate,navigate,screenshot. The skill says slim enables only navigation and screenshot tools.Reproduction
Executed on macOS against the published 1.10.1 package and a local build of
mainb2f522c, with usage statistics and update checks disabled.npm i --prefix /tmp/x chrome-devtools-mcp@1.10.1 @modelcontextprotocol/sdk.chrome-devtools-mcp --slim --headless --isolated --no-usage-statistics --no-performance-cruxthrough an MCP stdio client (@modelcontextprotocol/sdkClient+StdioClientTransport) and calltools/list.skills/troubleshooting/SKILL.mdline 62.Expectation
The skill's description of slim mode should match the slim tool set defined in
docs/slim-tool-reference.mdandsrc/tools/slim/tools.ts:navigate(Navigation automation),evaluateandscreenshot(Debugging).evaluatehas been in slim mode since--slimwas introduced (#958), before the troubleshooting skill was added (#1083).Chrome DevTools MCP version
1.10.1 (npm) and
mainb2f522c (local build)Chrome version
154.0.8037.93 (stable, headless, isolated)
Node version
v24.21.0
Operating system
macOS
Evidence
docs/slim-tool-reference.mdandsrc/tools/slim/tools.tsat tagchrome-devtools-mcp-v1.10.1andmainb2f522c.skills/troubleshooting/SKILL.md:62(identical in 1.10.1 andmainb2f522c) compared with thetools/listresult under Actual behavior.Fix check
Failing now: the skill's slim description lists navigation and screenshot tools only, while
tools/listunder--slimreturnsevaluate,navigateandscreenshot. Restored: the skill's description of slim mode matches thetools/listresult under--slim. Control: the advice to check for--slimwhen a tool is not found stays intact.