diff --git a/src/tools/search.ts b/src/tools/search.ts
index 5621ccf..f9be64d 100644
--- a/src/tools/search.ts
+++ b/src/tools/search.ts
@@ -21,10 +21,70 @@ export async function registerSearchTools(server: ObsidianMCPServer): Promise<vo
   server.registerTool(
     'obsidian_search',
     'Search vault for text. Returns matching files or optionally match counts using `total` flag. Supports path filtering, result limits, case sensitivity, and multiple output formats (text/json).',
-    { type: 'object', properties: {} },
+    {
+      type: 'object',
+      required: ['query'],
+      properties: {
+        query: {
+          type: 'string',
+          description: 'Search query text (required)',
+        },
+        path: {
+          type: 'string',
+          description: 'Limit search to folder path (optional)',
+        },
+        limit: {
+          type: 'number',
+          description: 'Maximum number of results to return (optional)',
+        },
+        total: {
+          type: 'boolean',
+          description: 'Return match count instead of file list (optional)',
+        },
+        case: {
+          type: 'boolean',
+          description: 'Case sensitive search (optional)',
+        },
+        format: {
+          type: 'string',
+          enum: ['text', 'json'],
+          description: 'Output format (optional, default: text)',
+        },
+      },
+    },
     createToolHandler(
       'Search vault for text',
-      { type: 'object', properties: {} },
+      {
+        type: 'object',
+        required: ['query'],
+        properties: {
+          query: {
+            type: 'string',
+            description: 'Search query text (required)',
+          },
+          path: {
+            type: 'string',
+            description: 'Limit search to folder path (optional)',
+          },
+          limit: {
+            type: 'number',
+            description: 'Maximum number of results to return (optional)',
+          },
+          total: {
+            type: 'boolean',
+            description: 'Return match count instead of file list (optional)',
+          },
+          case: {
+            type: 'boolean',
+            description: 'Case sensitive search (optional)',
+          },
+          format: {
+            type: 'string',
+            enum: ['text', 'json'],
+            description: 'Output format (optional, default: text)',
+          },
+        },
+      },
       async (args) => {
         const validated = searchSchema.parse(args) as any;
         const sanitized = sanitizeParameters(validated) as any;