fix(parallel): revert search_queries param type to string for backwards compatibility

Author: waleedlatif1

apps/docs/content/docs/en/tools/parallel_ai.mdx

@@ -44,7 +44,7 @@ Search the web using Parallel AI. Provides comprehensive search results with int
 | Parameter | Type | Required | Description |
 | --------- | ---- | -------- | ----------- |
 | `objective` | string | Yes | The search objective or question to answer |
-| `search_queries` | json | No | Array of search queries to execute |
+| `search_queries` | string | No | Comma-separated list of search queries to execute |
 | `mode` | string | No | Search mode: one-shot, agentic, or fast \(default: one-shot\) |
 | `max_results` | number | No | Maximum number of results to return \(default: 10\) |
 | `max_chars_per_result` | number | No | Maximum characters per result excerpt \(minimum: 1000\) |

apps/sim/tools/parallel/search.ts

@@ -16,10 +16,10 @@ export const searchTool: ToolConfig<ParallelSearchParams, ToolResponse> = {
       description: 'The search objective or question to answer',
     },
     search_queries: {
-      type: 'json',
+      type: 'string',
       required: false,
       visibility: 'user-or-llm',
-      description: 'Array of search queries to execute',
+      description: 'Comma-separated list of search queries to execute',
     },
     mode: {
       type: 'string',