ToolTrust
A4/100
ryaker

outlook-mcp

mcp2.0.0

@ryaker

MCP server for Claude to access Outlook data via Microsoft Graph API

By ryaker | 23 findings | Scanned 9/11/2026 | tooltrust-scanner/v0.3.19 | 434

7 Low16 Info

Risk Summary

Safe With Normal Controls

Excessive Permissions is the main signal, but overall risk remains within an acceptable range.

Potential impact: The agent may gain overly broad access to files, network, databases, or execution capabilities.

Recommended action: No high-risk findings were detected in this scan, but you should still apply least-privilege defaults and rescan after changes.

Suggested policy: keep this tool behind manual approval, do not allow unattended runs, and re-scan after narrowing risky permissions.

Security Findings (23)

  • LowAS-002

    ⚠️Excessive Permissions ×3

    input schema exposes 23 properties (threshold: 10)

    messageteams

    input schema exposes 20 properties (threshold: 10)

    calendar

    Fix: Tool requests broad permissions (exec/fs/network). Validate input parameters using Enums where possible, and restrict file system operations to explicit allowed directories.

  • LowAS-011

    ℹ️Missing Rate-Limit / Timeout ×4

    tool performs network or execution operations but declares no rate-limit, timeout, or retry configuration

    messagecalendarsummaryteams

    Fix: Declare explicit rate-limit, timeout, and retry configuration for all network and execution tools. Implement exponential back-off and surface resource state to the calling agent.

  • InfoAS-002

    ⚠️Excessive Permissions ×4

    declared capabilities: HTTP requests

    messagecalendar

    declared capabilities: code/command execution

    summaryteams

    Fix: Tool requests broad permissions (exec/fs/network). Validate input parameters using Enums where possible, and restrict file system operations to explicit allowed directories.

  • InfoAS-007

    ℹ️Missing Description or Schema ×6

    Tool 'message' has no description - agents cannot reason about its purpose, and static analysis coverage is limited

    message

    Tool 'calendar' has no description - agents cannot reason about its purpose, and static analysis coverage is limited

    calendar

    Tool 'me' has no description - agents cannot reason about its purpose, and static analysis coverage is limited

    me

    Tool 'summary' has no description - agents cannot reason about its purpose, and static analysis coverage is limited

    summary

    Tool 'notifications' has no description - agents cannot reason about its purpose, and static analysis coverage is limited

    notifications

    Tool 'teams' has no description - agents cannot reason about its purpose, and static analysis coverage is limited

    teams

    Fix: Review and remediate the identified issue.

  • InfoAS-014

    ℹ️Dependency Inventory Unavailable ×6

    No metadata.dependencies or repo_url were exposed by this MCP server, and no local project manifest could be inferred from the launch command.

    messagecalendarmesummarynotificationsteams

    Fix: Review and remediate the identified issue.

Scan this tool yourself

Reproduce this audit locally, integrate into CI, or let your agent audit its own tools.

Install once, then scan any MCP server:

$ curl -sfL https://raw.githubusercontent.com/AgentSafe-AI/tooltrust-scanner/main/install.sh | bash
$ tooltrust-scanner scan --server "npx -y outlook-mcp"

Adjust the package name if your npm registry name differs from the tool ID. View source

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