Reduce MCP token usage

CHANGELOG.md

@@ -16,6 +16,10 @@ loosely follows [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 - Grid-mode `get_process_output` now returns whitespace-normalized
   text to avoid sending padded terminal rows and repeated blank lines
   over MCP.
+- MCP responses now use slimmer defaults: tool-call JSON is no longer
+  duplicated into text content, large output and scratchpad reads are
+  capped with truncation metadata, and `whoami` / `get_project_status`
+  only include full tool lists when `include_tools` is requested.
 
 ### Fixed
 - Injected agent input now sends the submit Enter as a separated,