diff --git a/.speakeasy/in.openapi.yaml b/.speakeasy/in.openapi.yaml
index bdcb5aec..8e7075f3 100644
--- a/.speakeasy/in.openapi.yaml
+++ b/.speakeasy/in.openapi.yaml
@@ -168,7 +168,11 @@ components:
             anyOf:
               - allOf:
                   - $ref: '#/components/schemas/FunctionTool'
-                  - properties: {}
+                  - properties:
+                      defer_loading:
+                        description: 'Withhold this tool from the model until `openrouter:tool_search` finds it. Requires the tool search server tool; at least one tool must remain non-deferred.'
+                        example: true
+                        type: 'boolean'
                     type: 'object'
                 description: 'Function tool definition'
                 example:
@@ -214,6 +218,7 @@ components:
               - $ref: '#/components/schemas/ApplyPatchServerTool_OpenRouter'
               - $ref: '#/components/schemas/BashServerTool'
               - $ref: '#/components/schemas/ShellServerTool_OpenRouter'
+              - $ref: '#/components/schemas/ToolSearchServerTool'
               - additionalProperties: {}
                 properties:
                   type:
@@ -3983,7 +3988,11 @@ components:
             oneOf:
               - allOf:
                   - $ref: '#/components/schemas/FunctionTool'
-                  - properties: {}
+                  - properties:
+                      defer_loading:
+                        description: 'Withhold this tool from the model until `openrouter:tool_search` finds it. Requires the tool search server tool; at least one tool must remain non-deferred.'
+                        example: true
+                        type: 'boolean'
                     type: 'object'
                 description: 'Function tool definition'
                 example:
@@ -13429,6 +13438,7 @@ components:
               - $ref: '#/components/schemas/AnthropicToolSearchToolBm25'
               - $ref: '#/components/schemas/AnthropicToolSearchToolRegex'
               - $ref: '#/components/schemas/ShellServerTool_OpenRouter'
+              - $ref: '#/components/schemas/ToolSearchServerTool'
           type: 'array'
         top_k:
           type: 'integer'
@@ -22301,7 +22311,11 @@ components:
             anyOf:
               - allOf:
                   - $ref: '#/components/schemas/FunctionTool'
-                  - properties: {}
+                  - properties:
+                      defer_loading:
+                        description: 'Withhold this tool from the model until `openrouter:tool_search` finds it. Requires the tool search server tool; at least one tool must remain non-deferred.'
+                        example: true
+                        type: 'boolean'
                     type: 'object'
                 description: 'Function tool definition'
                 example:
@@ -22347,6 +22361,7 @@ components:
               - $ref: '#/components/schemas/ApplyPatchServerTool_OpenRouter'
               - $ref: '#/components/schemas/BashServerTool'
               - $ref: '#/components/schemas/ShellServerTool_OpenRouter'
+              - $ref: '#/components/schemas/ToolSearchServerTool'
           type: 'array'
         top_k:
           type: 'integer'
@@ -24162,6 +24177,32 @@ components:
         - 'mode'
         - 'tools'
       type: 'object'
+    ToolSearchServerTool:
+      description: 'OpenRouter built-in server tool: finds tools marked `defer_loading` and makes them callable'
+      example:
+        parameters:
+          max_results: 5
+        type: 'openrouter:tool_search'
+      properties:
+        parameters:
+          $ref: '#/components/schemas/ToolSearchServerToolConfig'
+        type:
+          enum:
+            - 'openrouter:tool_search'
+          type: 'string'
+      required:
+        - 'type'
+      type: 'object'
+    ToolSearchServerToolConfig:
+      description: 'Configuration for the openrouter:tool_search server tool'
+      example:
+        max_results: 5
+      properties:
+        max_results:
+          description: 'Maximum tools returned by one search. Defaults to 5.'
+          example: 5
+          type: 'integer'
+      type: 'object'
     TooManyRequestsResponse:
       description: 'Too Many Requests - Rate limit exceeded'
       example: