chore: import upstream snapshot with attribution

apps/sim/tools/grain/list_hooks.ts

@@ -0,0 +1,60 @@
+import type { GrainListHooksParams, GrainListHooksResponse } from '@/tools/grain/types'
+import type { ToolConfig } from '@/tools/types'
+
+export const grainListHooksTool: ToolConfig<GrainListHooksParams, GrainListHooksResponse> = {
+  id: 'grain_list_hooks',
+  name: 'Grain List Webhooks',
+  description: 'List all webhooks for the account',
+  version: '1.0.0',
+
+  params: {
+    apiKey: {
+      type: 'string',
+      required: true,
+      visibility: 'user-only',
+      description: 'Grain API key (Personal Access Token)',
+    },
+  },
+
+  request: {
+    url: 'https://api.grain.com/_/public-api/hooks',
+    method: 'GET',
+    headers: (params) => ({
+      'Content-Type': 'application/json',
+      Authorization: `Bearer ${params.apiKey}`,
+    }),
+  },
+
+  transformResponse: async (response) => {
+    const data = await response.json()
+
+    if (!response.ok) {
+      throw new Error(data.error || data.message || 'Failed to list webhooks')
+    }
+
+    return {
+      success: true,
+      output: {
+        hooks: data.hooks || data || [],
+      },
+    }
+  },
+
+  outputs: {
+    hooks: {
+      type: 'array',
+      description: 'Array of hook objects',
+      items: {
+        type: 'object',
+        properties: {
+          id: { type: 'string', description: 'Hook UUID' },
+          enabled: { type: 'boolean', description: 'Whether hook is active' },
+          hook_url: { type: 'string', description: 'Webhook URL' },
+          view_id: { type: 'string', description: 'Grain view ID' },
+          actions: { type: 'array', description: 'Configured actions' },
+          inserted_at: { type: 'string', description: 'Creation timestamp' },
+        },
+      },
+    },
+  },
+}