feat: focus Work tools by task intent

agent_platform/runtime/tools.py

@@ -92,7 +92,7 @@ TOOL_METADATA: dict[str, ToolMetadata] = {
     ),
     "write_file": ToolMetadata(
         "write_file",
-        "Write the complete UTF-8 contents of a workspace file.",
+        "Write complete UTF-8 file contents. Use actual line breaks between source lines, not literal \\\\n text.",
         object_schema(
             {
                 "path": {"type": "string", "maxLength": 4096},
@@ -115,7 +115,8 @@ TOOL_METADATA: dict[str, ToolMetadata] = {
     ),
     "exec": ToolMetadata(
         "exec",
-        "Run a shell command in the isolated workspace.",
+        "Run a complete non-interactive shell command. Name the script, pass -c code, or invoke a test; "
+        "bare python, node, or shells are rejected.",
         object_schema(
             {
                 "command": {"type": "string"},