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Visual_Annotation_MCP: Instructions file for Claude Code

CLAUDE.md

Visual_Annotation_MCP CLAUDE.md is an instructions file for Claude Code from mstocker1/Visual_Annotation_MCP. It costs 450 tokens per session, scanned A, original, MIT.

Project instructions for setting up and using a visual-annotation MCP server with Claude Code. The server uses Playwright, a tool for controlling a browser, to support visual annotation tasks.

In plain words
What is it for?
Use it when installing the server, configuring its project-level MCP connection, launching its browser, or fixing Python, startup-timeout, and tool-visibility issues.
Why use it?
It records setup and troubleshooting steps so the server can start correctly and its tools appear in Claude Code.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions Claude Code.

This is mstocker1/Visual_Annotation_MCP's own configuration. It tells Claude Code how to work on Visual_Annotation_MCP itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything Visual_Annotation_MCP configures →

not rated 0repo 7mo ago A scan 450 tokens original MIT
View source ↗ mstocker1/Visual_Annotation_MCP
Reuse

Borrowing it

Nothing to install: this file belongs to mstocker1/Visual_Annotation_MCP. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/mstocker1/Visual_Annotation_MCP/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/mstocker1/Visual_Annotation_MCP

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

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README.md
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<a href="https://agentmods.dev/instructions/mstocker1/visual_annotation_mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/mstocker1/visual_annotation_mcp/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

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Your own site · 80×15
<a href="https://agentmods.dev/instructions/mstocker1/visual_annotation_mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/mstocker1/visual_annotation_mcp/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 450 This file is loaded in full into every session.
When invoked 450 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00450 $0.00450
Opus 5.5 $0.00180 $0.00180
Sonnet 5.5 $0.00090 $0.00090
Haiku 4.5 $0.00045 $0.00045

Measured 2mo ago against content hash 83cd7d81869f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

Visual_Annotation_MCP CLAUDE.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

CLAUDE.md · 29 lines

What it actually says

Visual Annotation MCP — Claude Code

One-time setup (this repo)

  1. Create a venv and install (from repo root):

    python -m venv .venv

    Windows: .venv\Scripts\pip install -e . then .venv\Scripts\python -m playwright install chromium

    macOS/Linux: source .venv/bin/activate && pip install -e . && python -m playwright install chromium

  2. MCP config is in .mcp.json (project scope). Claude Code may ask you to approve project MCP servers once; if tools do not appear, run claude mcp reset-project-choices and restart.

  3. If the server fails to start because python is not on PATH for the GUI (common on Windows), either:

    • set VISUAL_ANNOTATION_PYTHON to your venv interpreter before starting Claude Code (full path to python.exe or python), or
    • replace the command in .mcp.json with that full path, or
    • on Windows only, point command/args at powershell + -File scripts/run_visual_mcp.ps1 (run from this repo root).

  4. First browser launch can be slow; if needed start Claude with a higher MCP startup timeout, e.g. MCP_TIMEOUT=120000 (units per your shell / Claude docs).

  5. In Claude Code, run /mcp and confirm visual-annotation is connected. Tools: navigate, inspect_elements, screenshot_viewport, screenshot_element, highlight_element, annotate_last_image.

Quick manual test prompt

After opening a project that contains this .mcp.json, ask Claude to: navigate to https://example.com, run inspect_elements, take a viewport screenshot, and describe what it sees.

Optional host allowlist: set VISUAL_ANNOTATION_ALLOWED_HOSTS (comma-separated hostnames, no https://) in the server env block of .mcp.json if you want to restrict URLs.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2mo ago First seen · 29 lines · 450 tokens per session scan A 83cd7d81869f

Subscribe to this mod's changes

Visual_Annotation_MCP CLAUDE.md is an instructions file published in the GitHub repository mstocker1/Visual_Annotation_MCP (0 stars, last pushed 7mo ago), licensed MIT. It adds 450 tokens to every session, about $0.0018 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Browser automationDesign and UX
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