Fixes return of mcp-sdk

Signed-off-by: Marcos Candeia <[email protected]>

Author: mcandeia

deno.json

@@ -1,6 +1,6 @@
 {
   "name": "@deco/mcp",
-  "version": "0.7.6",
+  "version": "0.7.7",
   "exports": {
     ".": "./mod.ts",
     "./http": "./mcp/http.ts"

mcp/server.ts

@@ -279,11 +279,16 @@ function registerTools<TManifest extends AppManifest>(
         state,
       );
 
+      const resultOrEmpty = result ?? {};
+
       return {
-        content: [{ type: "text" as const, text: JSON.stringify(result) }],
+        content: [{
+          type: "text" as const,
+          text: JSON.stringify(resultOrEmpty),
+        }],
         isError: false,
         // deno-lint-ignore no-explicit-any
-        structuredContent: result as any,
+        structuredContent: resultOrEmpty as any,
       };
     } catch (err) {
       console.error(err);

mcp/utils.ts

@@ -31,8 +31,7 @@ export function dereferenceSchema(
     // Save the original schema metadata (excluding $ref)
     const { $ref: _, ...originalMetadata } = schema;
 
-    const description =
-      (originalMetadata?.description ?? "") ||
+    const description = (originalMetadata?.description ?? "") ||
       (referencedSchema?.description ?? "");
 
     // Merge the original metadata with the dereferenced schema
@@ -56,7 +55,7 @@ export function dereferenceSchema(
       // Handle tuple types
       result.items = result.items
         .map((item) =>
-          dereferenceSchema(item as JSONSchema7, definitions, visited),
+          dereferenceSchema(item as JSONSchema7, definitions, visited)
         )
         .filter(Boolean) as JSONSchema7[];
     } else {
@@ -107,14 +106,14 @@ export function dereferenceSchema(
   // Handle anyOf
   if (result.anyOf) {
     result.anyOf = result.anyOf.map((subSchema: any) =>
-      dereferenceSchema(subSchema as JSONSchema7, definitions, visited),
+      dereferenceSchema(subSchema as JSONSchema7, definitions, visited)
     ) as JSONSchema7[];
   }
 
   // Handle oneOf
   if (result.oneOf) {
     result.oneOf = result.oneOf.map((subSchema: any) =>
-      dereferenceSchema(subSchema as JSONSchema7, definitions, visited),
+      dereferenceSchema(subSchema as JSONSchema7, definitions, visited)
     ) as JSONSchema7[];
   }