Atlas / MCP servers / anthropics / Anthropic Tools

Anthropic ToolsSAFE

mcp/anthropics/anthropic-tools

None

Verdict
SAFE
Grade
B
Trust score
89 /100
Exposed tools
1 1r · 0w · 0d
Transport
—
License
—
Stars
411
01

Overview

From the repository's own README, as read at the audited commit. Badges and raw HTML are left out.

⚠️ DEPRECATION NOTICE This repository is deprecated and no longer maintained. For up-to-date information on using tools with Claude, please refer to our official documentation at: https://docs.anthropic.com/en/docs/build-with-claude/tool-use The official API provides a more robust, supported, and production-ready implementation of tool use functionality.

A repo for using tools/function calling with Anthropic models. This SDK is Currently in Alpha and meant ONLY AS A RESEARCH PREVIEW. We promise no ongoing support. It is not intended for production use. Production-ready function calling support is coming to the Anthropic API soon.

Setup

Set your Anthropic API key as an environment variable:

# MacOS
export ANTHROPIC_API_KEY={your_anthropic_api_key}

If you are accessing Claude through AWS Bedrock, set the following enviroment variables instead:

# MacOS
export AWS_ACCESS_KEY_ID={your_AWS_access_key_id}
export AWS_SECRET_ACCESS_KEY={your_AWS_secret_access_key}
export AWS_SESSION_TOKEN={your_AWS_session_token}

[Optional] If you want to test the Brave search tool, set your Brave API key as an enviroment variable (get a key here):

# MacOS
export BRAVE_API_KEY={your_brave_api_key}

Create a Python Virtual Environment:

# MacOS
python3 -m venv anthropictools
source anthropictools/bin/activate

Install Requirements:

pip install -r requirements.txt

Getting Started

anthropic-tools follows a very simple architecture that lets users define and use tools with Claude. There are two classes users should be familiar with: BaseTool and ToolUser.

Additionally, anthropic-tools introduces a new structured prompt format that you will want to pay close attention to. This should make for easier prompt construction and parsing.

anthropic-tools also supports a number of pre-built tools out of the box, built on top of the same primitive

Read from source at commit de71ca1556ecOBSERVED · 2026-10-01
02

Exposed tools (1)

1 read · 0 write · 0 destructive.

ToolRiskDescription
testreadThis is a test search tool.
03

Trust audit

SAFEgrade B · trust 89/100 Nothing in the source contradicts what it says it does. Grade A is reserved for packages that have also passed the behavioural sandbox.

LayerWhat it checksResult
L0Provenance & inventoryPASS
L1Static analysis of the codePASS
L2Instruction surface (what it tells the agent)PASS
L3Class-specific surfacePASS
L4Behavioural (sandbox)SKIPPED

What the source does

Filesystem
none-observed
Network
declared (5 observation(s))
Shell
none-observed
Dependencies
pinned
Secrets in source
none-found

Findings (2)

LOWInventory / provenance · inv.no_license · CWE-1104
Why it matters. no LICENSE file and no repo licence
Fix. add a licence
INFOInventory / provenance · inv.oversize · CWE-1104
tool_use_package/tools/search/vector_search/data/amazon-products.jsonl
tool_use_package/tools/search/vector_search/data/amazon-products.jsonl
Why it matters. 5693256 bytes not read

Gates applied: no_behavioural_pass, no_license.

Audited 2026-10-01 · audit v0.4.1 · source sha de71ca1556ecfull audit observations/trust-audit/mcp-server/anthropics__anthropic-tools.json · Report an issue / request a re-scan
04

Audit history

Every audit this server has had. A grade with a past is a grade somebody is still checking.

DateSourceVerdictGradeScoreChange
2026-10-01de71ca1556ecSAFEB89first audit
05

Questions

What is the Anthropic Tools MCP server?

None

What tools does Anthropic Tools expose?

1 in total: 1 read-only, 0 that write, and 0 that can delete or overwrite. Every one is listed on this page with its risk.

Is Anthropic Tools safe to connect to an agent?

The audit found nothing in the source that contradicts what it says it does, and graded it B (89/100). Grade A is held back for packages that have also passed a sandboxed behavioural run, which is why a clean server reads B.

What credentials does Anthropic Tools need?

It reads BRAVE_API_KEY, ELASTICSEARCH_API_KEY, ELASTICSEARCH_API_KEY_ID, HUGGINGFACE_API_KEY and PINECONE_API_KEY from the environment. Give it a token scoped to the least it needs — an agent that can be talked into calling a tool can be talked into calling it with your credentials.

How current is this page?

The grade is for one exact copy of the source (de71ca1556ec), read on 2026-10-01. The repository is watched and re-audited when it changes.

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