Update OpenTelemetryChatClient to output data on all tools

We're currently filtering down to only AITools that are AIFunctionDeclaration. With this, we'll handle AIFunctionDeclaration wrappers the same as well, and for all other tools emit their name as the type. This can be further extended as otel adds more details about how non-function tools should be represented.

Author: stephentoub

src/Libraries/Microsoft.Extensions.AI.Abstractions/Microsoft.Extensions.AI.Abstractions.json

@@ -1952,6 +1952,10 @@
         {
           "Member": "System.Collections.Generic.IList<Microsoft.Extensions.AI.AIContent>? Microsoft.Extensions.AI.HostedCodeInterpreterTool.Inputs { get; set; }",
           "Stage": "Stable"
+        },
+        {
+          "Member": "override string Microsoft.Extensions.AI.HostedCodeInterpreterTool.Name { get; }",
+          "Stage": "Stable"
         }
       ]
     },
@@ -1972,6 +1976,10 @@
         {
           "Member": "int? Microsoft.Extensions.AI.HostedFileSearchTool.MaximumResultCount { get; set; }",
           "Stage": "Stable"
+        },
+        {
+          "Member": "override string Microsoft.Extensions.AI.HostedFileSearchTool.Name { get; }",
+          "Stage": "Stable"
         }
       ]
     },
@@ -1983,6 +1991,12 @@
           "Member": "Microsoft.Extensions.AI.HostedWebSearchTool.HostedWebSearchTool();",
           "Stage": "Stable"
         }
+      ],
+      "Properties": [
+        {
+          "Member": "override string Microsoft.Extensions.AI.HostedWebSearchTool.Name { get; }",
+          "Stage": "Stable"
+        }
       ]
     },
     {

src/Libraries/Microsoft.Extensions.AI.Abstractions/Tools/HostedCodeInterpreterTool.cs

@@ -17,6 +17,9 @@ public HostedCodeInterpreterTool()
     {
     }
 
+    /// <inheritdoc />
+    public override string Name => "code_interpreter";
+
     /// <summary>Gets or sets a collection of <see cref="AIContent"/> to be used as input to the code interpreter tool.</summary>
     /// <remarks>
     /// Services support different varied kinds of inputs. Most support the IDs of files that are hosted by the service,

src/Libraries/Microsoft.Extensions.AI.Abstractions/Tools/HostedFileSearchTool.cs

@@ -17,6 +17,9 @@ public HostedFileSearchTool()
     {
     }
 
+    /// <inheritdoc />
+    public override string Name => "file_search";
+
     /// <summary>Gets or sets a collection of <see cref="AIContent"/> to be used as input to the file search tool.</summary>
     /// <remarks>
     /// If no explicit inputs are provided, the service determines what inputs should be searched. Different services

src/Libraries/Microsoft.Extensions.AI.Abstractions/Tools/HostedMcpServerTool.cs

@@ -39,6 +39,9 @@ public HostedMcpServerTool(string serverName, Uri url)
         Url = Throw.IfNull(url);
     }
 
+    /// <inheritdoc />
+    public override string Name => "mcp";
+
     /// <summary>
     /// Gets the name of the remote MCP server that is used to identify it.
     /// </summary>

src/Libraries/Microsoft.Extensions.AI.Abstractions/Tools/HostedWebSearchTool.cs

@@ -14,4 +14,7 @@ public class HostedWebSearchTool : AITool
     public HostedWebSearchTool()
     {
     }
+
+    /// <inheritdoc />
+    public override string Name => "web_search";
 }

src/Libraries/Microsoft.Extensions.AI/ChatCompletion/OpenTelemetryChatClient.cs

@@ -396,16 +396,20 @@ internal static string SerializeChatMessages(IEnumerable<ChatMessage> messages,
 
                     if (EnableSensitiveData)
                     {
-                        if (options.Tools?.Any(t => t is AIFunctionDeclaration) is true)
+                        if (options.Tools is { Count: > 0 })
                         {
                             _ = activity.AddTag(
-                                    OpenTelemetryConsts.GenAI.Tool.Definitions,
-                                    JsonSerializer.Serialize(options.Tools.OfType<AIFunctionDeclaration>().Select(t => new OtelFunction
+                                OpenTelemetryConsts.GenAI.Tool.Definitions,
+                                JsonSerializer.Serialize(options.Tools.Select(t => t switch
+                                {
+                                    _ when t.GetService<AIFunctionDeclaration>() is { } af => new OtelFunction
                                     {
-                                        Name = t.Name,
-                                        Description = t.Description,
-                                        Parameters = t.JsonSchema,
-                                    }), OtelContext.Default.IEnumerableOtelFunction));
+                                        Name = af.Name,
+                                        Description = af.Description,
+                                        Parameters = af.JsonSchema,
+                                    },
+                                    _ => new OtelFunction { Type = t.Name },
+                                }), OtelContext.Default.IEnumerableOtelFunction));
                         }
 
                         // Log all additional request options as raw values on the span.
@@ -601,7 +605,7 @@ private sealed class OtelFunction
         public string Type { get; set; } = "function";
         public string? Name { get; set; }
         public string? Description { get; set; }
-        public JsonElement Parameters { get; set; }
+        public JsonElement? Parameters { get; set; }
     }
 
     private static readonly JsonSerializerOptions _defaultOptions = CreateDefaultOptions();

test/Libraries/Microsoft.Extensions.AI.Abstractions.Tests/Tools/HostedCodeInterpreterToolTests.cs

@@ -11,11 +11,11 @@ public class HostedCodeInterpreterToolTests
     public void Constructor_Roundtrips()
     {
         var tool = new HostedCodeInterpreterTool();
-        Assert.Equal(nameof(HostedCodeInterpreterTool), tool.Name);
+        Assert.Equal("code_interpreter", tool.Name);
         Assert.Empty(tool.Description);
         Assert.Empty(tool.AdditionalProperties);
         Assert.Null(tool.Inputs);
-        Assert.Equal(nameof(HostedCodeInterpreterTool), tool.ToString());
+        Assert.Equal(tool.Name, tool.ToString());
     }
 
     [Fact]

test/Libraries/Microsoft.Extensions.AI.Abstractions.Tests/Tools/HostedFileSearchToolTests.cs

@@ -11,12 +11,12 @@ public class HostedFileSearchToolTests
     public void Constructor_Roundtrips()
     {
         var tool = new HostedFileSearchTool();
-        Assert.Equal(nameof(HostedFileSearchTool), tool.Name);
+        Assert.Equal("file_search", tool.Name);
         Assert.Empty(tool.Description);
         Assert.Empty(tool.AdditionalProperties);
         Assert.Null(tool.Inputs);
         Assert.Null(tool.MaximumResultCount);
-        Assert.Equal(nameof(HostedFileSearchTool), tool.ToString());
+        Assert.Equal(tool.Name, tool.ToString());
     }
 
     [Fact]

test/Libraries/Microsoft.Extensions.AI.Abstractions.Tests/Tools/HostedMcpServerToolTests.cs

@@ -31,7 +31,8 @@ public void Constructor_Roundtrips()
 
         Assert.Empty(tool.AdditionalProperties);
         Assert.Empty(tool.Description);
-        Assert.Equal(nameof(HostedMcpServerTool), tool.Name);
+        Assert.Equal("mcp", tool.Name);
+        Assert.Equal(tool.Name, tool.ToString());
 
         Assert.Equal("serverName", tool.ServerName);
         Assert.Equal("https://localhost/", tool.Url.ToString());

test/Libraries/Microsoft.Extensions.AI.Abstractions.Tests/Tools/HostedWebSearchToolTests.cs

@@ -11,9 +11,9 @@ public class HostedWebSearchToolTests
     public void Constructor_Roundtrips()
     {
         var tool = new HostedWebSearchTool();
-        Assert.Equal(nameof(HostedWebSearchTool), tool.Name);
+        Assert.Equal("web_search", tool.Name);
         Assert.Empty(tool.Description);
         Assert.Empty(tool.AdditionalProperties);
-        Assert.Equal(nameof(HostedWebSearchTool), tool.ToString());
+        Assert.Equal(tool.Name, tool.ToString());
     }
 }