diff --git a/internal/llm/agent/mcp-tools.go b/internal/llm/agent/mcp-tools.go
index 038cd43f4469953779799b70850355ef5dcda45f..6209efa29fb7d9a3a488ca730f6f8175e3b08a60 100644
--- a/internal/llm/agent/mcp-tools.go
+++ b/internal/llm/agent/mcp-tools.go
@@ -10,6 +10,7 @@ import (
 	"log/slog"
 	"maps"
 	"net/http"
+	"os"
 	"os/exec"
 	"strings"
 	"sync"
@@ -415,7 +416,7 @@ func createMCPTransport(ctx context.Context, m config.MCPConfig, resolver config
 			return nil, fmt.Errorf("mcp stdio config requires a non-empty 'command' field")
 		}
 		cmd := exec.CommandContext(ctx, home.Long(command), m.Args...)
-		cmd.Env = m.ResolvedEnv()
+		cmd.Env = append(os.Environ(), m.ResolvedEnv()...)
 		return &mcp.CommandTransport{
 			Command: cmd,
 		}, nil