Sanitize noisy MCP text fields by default

Clean control and invisible junk from tool result text fields to reduce token waste while preserving readable Unicode. Add an MCP_TEXT_SANITIZATION toggle and regression tests for enabled and disabled behavior.
2026-05-06 02:31:25 -04:00
parent def9084981
commit 22c8e915e9
8 changed files with 162 additions and 5 deletions
@@ -298,6 +298,11 @@ and IDs. Authorization headers, bearer tokens, and Redmine API keys are not
 logged. MCP tool output also redacts credential fields returned by Redmine, such
 as `api_key`.

+Tool output text sanitization is enabled by default to reduce token waste from
+invisible/control junk in fetched issue text. This cleanup preserves readable
+Unicode and targets fields such as `description`, `notes`, `content`, and
+message body text. Set `MCP_TEXT_SANITIZATION=false` to disable it.
+
 Example stdio client configuration:

 ```json