docs: clarify read_command_output search param should be omitted when not filtering

src/core/prompts/tools/native-tools/read_command_output.ts

@@ -20,7 +20,7 @@ The tool supports two modes:
 
 Parameters:
 - artifact_id: (required) The artifact filename from the truncated output message (e.g., "cmd-1706119234567.txt")
-- search: (optional) Pattern to filter lines. Supports regex or literal strings. Case-insensitive.
+- search: (optional) Pattern to filter lines. Supports regex or literal strings. Case-insensitive. **Omit this parameter entirely if you don't need to filter - do not pass null or empty string.**
 - offset: (optional) Byte offset to start reading from. Default: 0. Use for pagination.
 - limit: (optional) Maximum bytes to return. Default: 40KB.
 
@@ -38,7 +38,7 @@ Example: Finding specific test failures
 
 const ARTIFACT_ID_DESCRIPTION = `The artifact filename from the truncated command output (e.g., "cmd-1706119234567.txt")`
 
-const SEARCH_DESCRIPTION = `Optional regex or literal pattern to filter lines (case-insensitive, like grep)`
+const SEARCH_DESCRIPTION = `Optional regex or literal pattern to filter lines (case-insensitive, like grep). Omit this parameter if not searching - do not pass null or empty string.`
 
 const OFFSET_DESCRIPTION = `Byte offset to start reading from (default: 0, for pagination)`