MCP Tools

The MCP daemon exposes 45+ tools organized into functional groups. All tools are available to any MCP-aware agent (Claude Code, Cursor, Kiro, Windsurf, …).

Install the agent playbook

The fastest way to learn the full toolset is to install @harness-fe/skill:

npx @harness-fe/skill install

This drops a SKILL.md into your agent project with the complete tool catalog, mental model, decision flow, and usage examples.

Tool groups

Identity & topology

Tool	Description
tab.list	List all known tabs with their project, session, and URL
project.list	List all projects seen by the daemon
project.tree	Project hierarchy (parent → child for micro-frontends)
dashboard.open	Return (and optionally open) the dashboard URL

Page interaction

Tool	Description
page.navigate	Navigate to a URL in the active tab
page.click	Click an element by selector
page.type	Type text into an element
page.scroll	Scroll the page or an element
page.screenshot	Capture a screenshot (returns base64 PNG)
page.dom_query	Query DOM elements and return their properties
page.evaluate	Run arbitrary JS in the page context
page.wait_for	Wait for an element or condition
page.set_html	Replace the innerHTML of an element
page.set_style	Inject or override CSS
page.reload	Reload the current page

Telemetry

Tool	Description
console.tail	Last N console log entries (log/warn/error)
network.tail	Last N network requests
network.get	Full details of a single request by ID
ws.tail	Last N WebSocket frames
ws.get	Full details of a single WS frame
errors.tail	Last N unhandled errors
session.tail	Raw timeline slice — all event types
session.summary	Session metadata + event counts
session.list	List sessions for a project

Wait & idle

Tool	Description
network.wait_for	Wait for a network request matching a pattern
network.wait_for_idle	Wait until no in-flight requests remain

Replay & forensics

Tool	Description
session.recordings.list	List rrweb recording chunks for a session
session.recordings.slice	Return chunks overlapping a time window
session.replay.create	Bundle chunks into a shareable rrweb player URL

Source intelligence

Tool	Description
project.where_is	Locate a component or source file — returns file path + line
project.source	Read source files from the project tree
project.module_graph	AST-derived component map for the project

Visitor journey

Tool	Description
visitor.list	List known visitors
visitor.get	Visitor metadata
visitor.journey	Ordered session chain for a visitor
visitor.timeline	Merged cross-tab event timeline for a visitor

Project memory

Tool	Description
project.memory.set	Write a persistent key/value memory entry for a project
project.memory.get	Read a memory entry
project.memory.list	List all memory entries for a project
project.memory.delete	Delete a memory entry

Build & storage

Tool	Description
build.list	List builds for a project
build.get	Build metadata

Selector syntax

Most page interaction tools accept a selector object:

// By CSS
{ "css": "button.submit" }

// By component name (source-aware — requires build plugin)
{ "comp": "SubmitButton" }

// By source location
{ "loc": "src/components/SubmitButton.tsx:42" }

// By visible text
{ "text": "Submit order" }

// Combine for precision
{ "comp": "CartBadge", "css": "button" }

The comp: and loc: forms only work when the build plugin has instrumented the source.

Further reading

• Install the playbook — npx @harness-fe/skill install
• Overlay Plugins — extend the in-page H button