fix: cast empty properties arrays to stdClass to prevent JSON [] instead of {}

2026-05-14 15:15:36 +00:00
parent 67915591ad
commit 580e2ef193
1 changed files with 12 additions and 5 deletions
@@ -29,11 +29,18 @@ class Registry {

    /** Returns MCP-formatted tool definitions for tools/list response */
    public function getToolDefinitions(): array {
-        return array_values(array_map(fn($t) => [
+        return array_values(array_map(function($t) {
+            $schema = $t['inputSchema'];
+            // PHP encodes empty [] as JSON array — cast to stdClass to get {}
+            if (isset($schema['properties']) && $schema['properties'] === []) {
+                $schema['properties'] = new \stdClass();
+            }
+            return [
                'name'        => $t['name'],
                'description' => $t['description'],
-            'inputSchema' => $t['inputSchema'],
-        ], $this->tools));
+                'inputSchema' => $schema,
+            ];
+        }, $this->tools));
    }

    /** Returns callable handler for a tool, or null if not found */