ToolTrust
B15/100
ezh0v

weather-mcp-server

mcp1.3.0

@ezh0v

A lightweight Model Context Protocol (MCP) server that enables AI assistants like Claude to retrieve and interpret real-time weather data. Discuss on Hacker News:

By ezh0v | 3 findings | Scanned 6/22/2026 | tooltrust-scanner/v0.3.19 | 245

1 High2 Info

Risk Summary

Safe With Normal Controls

Tool Drift is the main signal, but overall risk remains within an acceptable range.

Potential impact: This finding indicates the tool should be reviewed before it is trusted.

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 (3)

  • HighAS-012

    🔄Tool Drift

    Tool set changed silently at v1.3.0: 1 tool(s) added, 6 tool(s) removed without a version bump.

    + 1 added

    WEATHERMAP_WEATHER

    − 6 removed

    find_weather_stationsget_current_weatherget_hourly_forecastget_local_timeget_weather_alertsget_weather_forecast

    Fix: The set of tools exposed by this server changed between scans of the same version — a sign the package was silently updated without a version bump. Audit the changelog and all tool definitions before trusting this server. Pin to a specific commit hash rather than a floating version tag.

  • InfoAS-002

    ⚠️Excessive Permissions

    WEATHERMAP_WEATHER:declared capabilities: database access

    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-014

    ℹ️Dependency Inventory Unavailable

    WEATHERMAP_WEATHER:Tool did not expose metadata.dependencies or repo_url, so supply-chain coverage is limited.

    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 weather-mcp-server"

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

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