Files
agent-framework/dotnet/samples/02-agents/Harness/Harness_Step01_Research/WebBrowsingToolOptions.cs
westey 384e26abd7 .NET: Add allow listing for WebBrowsingTool (#5605)
* Add allow listing for WebBrowsingTool

* Address PR comments.
2026-05-05 15:20:55 +00:00

61 lines
3.1 KiB
C#

// Copyright (c) Microsoft. All rights reserved.
namespace SampleApp;
/// <summary>
/// Options that control which URLs the <see cref="WebBrowsingTool"/> is permitted to access.
/// </summary>
/// <remarks>
/// <para>
/// By default, <b>no hosts are accessible</b>. You must explicitly opt in to one or more
/// of the access modes below. The validation order is:
/// </para>
/// <list type="number">
/// <item><description>If the host matches an entry in <see cref="AllowedHosts"/>, the request is allowed.</description></item>
/// <item><description>If the resolved IP is a public address and <see cref="AllowPublicNetworks"/> is <see langword="true"/>, the request is allowed.</description></item>
/// <item><description>If the resolved IP is a private/loopback/link-local address and <see cref="AllowPrivateNetworks"/> is <see langword="true"/>, the request is allowed.</description></item>
/// <item><description>If <see cref="AllowAllHosts"/> is <see langword="true"/>, the request is allowed.</description></item>
/// <item><description>Otherwise, the request is blocked.</description></item>
/// </list>
/// </remarks>
internal sealed class WebBrowsingToolOptions
{
/// <summary>
/// Gets or sets a list of host patterns that are always permitted, regardless of other settings.
/// Patterns support wildcard prefix matching (e.g., <c>"*.example.com"</c> matches <c>"docs.example.com"</c>).
/// Exact host names (e.g., <c>"docs.microsoft.com"</c>) are also supported.
/// </summary>
/// <remarks>This has the highest priority — if a host matches, it is allowed immediately.</remarks>
public IReadOnlyList<string>? AllowedHosts { get; set; }
/// <summary>
/// Gets or sets a value indicating whether public internet hosts (non-private, non-loopback, non-link-local IPs) are permitted.
/// Default is <see langword="false"/>.
/// </summary>
public bool AllowPublicNetworks { get; set; }
/// <summary>
/// Gets or sets a value indicating whether private network hosts are permitted.
/// This includes RFC 1918 addresses (10.x.x.x, 172.16-31.x.x, 192.168.x.x),
/// loopback (127.x.x.x, ::1), link-local (169.254.x.x, fe80::),
/// and cloud metadata endpoints (169.254.169.254).
/// Default is <see langword="false"/>.
/// </summary>
/// <remarks>
/// <b>Warning:</b> Enabling this allows the agent to make requests to internal services,
/// localhost, and cloud metadata endpoints. Only enable this if you understand the SSRF risks.
/// </remarks>
public bool AllowPrivateNetworks { get; set; }
/// <summary>
/// Gets or sets a value indicating whether all hosts are permitted without any restriction.
/// Default is <see langword="false"/>.
/// </summary>
/// <remarks>
/// <b>⚠️ UNSAFE:</b> Enabling this disables all network boundary checks and allows the agent
/// to access any URL, including internal services, cloud metadata endpoints, and localhost.
/// Only use this for trusted, isolated environments where SSRF is not a concern.
/// </remarks>
public bool AllowAllHosts { get; set; }
}