outlook-mcp-server (acangialosi/outlook-mcp-server) is an MCP server listed on the M8ven Trust Index. It scores 74 out of 100, grade C. It declares 6 tools. No publisher has claimed this listing.

Back to MCP Trust IndexM8ven
C
Emerging
74/100
7 days ago

outlook-mcp-server

A local MCP server that gives Claude read/write access to a personal Hotmail/Outlook.com mailbox via the Microsoft Graph API, exposing tools for listing, searching, sending, and drafting emails.

→ acangialosi/outlook-mcp-server· listed on glama

Emerging. No concerning findings. Grades remain capped until the project builds reputation through adoption. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.

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Who stands behind it

acangialosi

Source: Glama

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// key findings
✅
No credential exfiltration, no sensitive file access, no obfuscation
Static analysis found nothing flowing your secrets to unexpected places.
🔐
You'll be asked for 1 credential: OUTLOOK_MCP_CLIENT_SECRET
These are read from process.env at runtime. Make sure you trust where they’ll be sent.
// environment variables
To run this server yourself, you supply these values. They go in your own MCP client configuration and stay on your machine. The secret label means the value is sensitive, not that the server mishandles it.
configOUTLOOK_MCP_CLIENT_IDAzure app registration's client ID.
🔐 secretOUTLOOK_MCP_CLIENT_SECRETOnly if using a confidential client (Web platform).
configOUTLOOK_MCP_CONFIG_DIRWhere config/token cache are stored. Defaults to ~/.outlook-mcp-server.
configOUTLOOK_MCP_REDIRECT_URIMust match the Azure app registration.
configOUTLOOK_MCP_TENANT(or via =common). This project is designed and tested
// quality suggestions

Tool annotations

No tools have read-only/destructive annotations

Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.

All four hints declared on every tool

6/6 tools missing one or more hints — create_draft (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); get_message (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); list_folders (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +3 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.

For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.

License file

No license file

Add a LICENSE file (MIT, Apache-2.0, etc.).

Tests exist

No test files found

Add tests that exercise each declared tool.

Claim the listing to review these findings one by one and send us a correction where you disagree, straight to the team. Claiming also means we tell you when the grade moves, and reach you first if we find anything urgent.

// full audit trail
The findings above are the summary. The full trail, every check we ran, each deduction, the network hosts observed and the dependency advisories, goes to verified publishers, along with an alert whenever a new one lands. Verified publishers can also review each finding and dispute it in one click. Publisher corrections have sharpened several of our checks this month, because the maintainer knows the codebase better than any scanner.
// improvement guidance — verified publishers only
We have 4 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.
// embed badge in your README
[![M8ven Score](https://m8ven.ai/badge/mcp/acangialosi/outlook-mcp-server)](https://m8ven.ai/mcp/acangialosi/outlook-mcp-server)
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commit: 5c86b75221c4acea22a2ca58e6d91b76a6eb6b55
code hash: f673cb7dd8af5c2667a47a81f41e74818860ba62cae2d0b012478c9a799841a1
verified: 9/2/2026, 5:43:18 PM
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