Ensure array definition has items type (#112)

The `list_resources` function didn't declare a type for both array
parameters it takes. While this works in other Clients like Cursor and
Roo, it did not in VSCode which enforces this more thoroughly.

This fixes that issue.

Related-to: #107

Signed-off-by: Juan Antonio Osorio <ozz@stacklok.com>

Author: JAORMX

pkg/mcp/tools.go

@@ -28,9 +28,17 @@ func NewListResourcesTool() mcp.Tool {
 		mcp.WithBoolean("include_annotations",
 			mcp.Description("Whether to include annotations in the output (default: true)")),
 		mcp.WithArray("exclude_annotation_keys",
-			mcp.Description("List of annotation keys to exclude from output (supports wildcards with *)")),
+			mcp.Description("List of annotation keys to exclude from output (supports wildcards with *)"),
+			mcp.Items(map[string]any{
+				"type": "string",
+			}),
+		),
 		mcp.WithArray("include_annotation_keys",
-			mcp.Description("List of annotation keys to include in output (if specified, only these are included)")),
+			mcp.Description("List of annotation keys to include in output (if specified, only these are included)"),
+			mcp.Items(map[string]any{
+				"type": "string",
+			}),
+		),
 		mcp.WithNumber("limit",
 			mcp.Description("Maximum number of resources to return (0 means no limit, default: 0)")),
 		mcp.WithString("continue",