Improvements for the search_file_content (isolated for model 3).

packages/core/src/tools/definitions/__snapshots__/coreToolsModelSnapshots.test.ts.snap

@@ -1089,7 +1089,7 @@ exports[`coreTools snapshots for specific models > Model: gemini-3-pro-preview >
 
 exports[`coreTools snapshots for specific models > Model: gemini-3-pro-preview > snapshot for tool: grep_search_ripgrep 1`] = `
 {
-  "description": "Searches for a regular expression pattern within file contents.",
+  "description": "Searches for a regular expression pattern within file contents. This tool is FAST and optimized, powered by ripgrep. PREFERRED over standard \`run_shell_command("grep ...")\` due to better performance and automatic output limiting (max 20k matches).",
   "name": "grep_search",
   "parametersJsonSchema": {
     "properties": {

packages/core/src/tools/definitions/coreTools.ts

@@ -88,7 +88,18 @@ export const RIP_GREP_DEFINITION: ToolDefinition = {
   get base() {
     return DEFAULT_LEGACY_SET.grep_search_ripgrep;
   },
-  overrides: (modelId) => getToolSet(modelId).grep_search_ripgrep,
+  overrides: (modelId: string) => {
+    if (
+      modelId.includes('gemini-3-pro-preview') ||
+      modelId.includes('gemini-3-flash-preview')
+    ) {
+      return {
+        description:
+          'Searches for a regular expression pattern within file contents. This tool is FAST and optimized, powered by ripgrep. PREFERRED over standard `run_shell_command("grep ...")` due to better performance and automatic output limiting (max 20k matches).',
+      };
+    }
+    return undefined;
+  },
 };
 
 export const WEB_SEARCH_DEFINITION: ToolDefinition = {