feat: add desc about resource link in docs

Signed-off-by: FanOne <294350394@qq.com>

Author: CocaineCong

mcp/types_test.go

@@ -135,4 +135,6 @@ func TestCallToolResultWithResourceLink(t *testing.T) {
 	assert.Equal(t, "resource_link", resourceLink.Type)
 	assert.Equal(t, "file:///example/test.pdf", resourceLink.URI)
 	assert.Equal(t, "Test Document", resourceLink.Name)
+	assert.Equal(t, "A test document", resourceLink.Description)
+	assert.Equal(t, "application/pdf", resourceLink.MIMEType)
 }

www/docs/pages/servers/tools.mdx

@@ -542,7 +542,7 @@ func handleGetResourceLinkTool(ctx context.Context, req mcp.CallToolRequest) (*m
 
 	// Create a resource link pointing to an existing resource
 	uri := fmt.Sprintf("file://documents/%s", resourceID)
-	resourceLink := mcp.NewResourceLink(uri, "name", "resource name", "file")
+	resourceLink := mcp.NewResourceLink(uri, "Document", "The requested document", "application/pdf")
 	return &mcp.CallToolResult{
 		Content: []mcp.Content{
 			mcp.NewTextContent("Found the requested document:"),
@@ -573,8 +573,21 @@ func handleSearchDocumentsTool(ctx context.Context, req mcp.CallToolRequest) (*m
 	// Add resource links for each found document
 	for _, doc := range foundDocs {
 		uri := fmt.Sprintf("file://documents/%s", doc)
-		docType := strings.Split(doc, ".")
-		resourceLink := mcp.NewResourceLink(uri, docType[0], "file", docType[1])
+		parts := strings.SplitN(doc, ".", 2)
+		name := parts[0]
+		mimeType := "application/octet-stream" // default
+		if len(parts) > 1 {
+			// Map extension to MIME type (simplified)
+			switch parts[1] {
+			case "pdf":
+				mimeType = "application/pdf"
+			case "txt":
+				mimeType = "text/plain"
+			case "md":
+				mimeType = "text/markdown"
+			}
+		}
+		resourceLink := mcp.NewResourceLink(uri, name, fmt.Sprintf("Document: %s", doc), mimeType)
 		content = append(content, resourceLink)
 	}
 
@@ -598,7 +611,7 @@ func handleGetAnnotatedResourceTool(ctx context.Context, req mcp.CallToolRequest
 		},
 	}
 	url := "file://documents/test.pdf"
-	resourceLink := mcp.NewResourceLink(url, "test", "doc", docType)
+	resourceLink := mcp.NewResourceLink(url, "Test Document", fmt.Sprintf("A %s document", docType), "application/pdf")
 	resourceLink.Annotated = annotated
 	return &mcp.CallToolResult{
 		Content: []mcp.Content{