fix: re-enable tool stripping after testing

With tools present, LS enters full agentic mode doing multi-turn
tool calls (file searches, terminal commands, etc.). A simple
weather question caused 40+ Google API calls in 120s before timeout.
Tool stripping is required to maintain single-turn behavior.

src/mitm/modify.rs

@@ -9,8 +9,9 @@ use serde_json::Value;
 use tracing::info;
 
 /// Strip ALL tool definitions.
-/// Set to false to allow tools through (for tool call testing).
-const STRIP_ALL_TOOLS: bool = false;
+/// Must be true: with tools present, the LS enters full agentic mode
+/// (multi-turn tool calls, file searches, etc.) burning quota.
+const STRIP_ALL_TOOLS: bool = true;
 
 /// Modify a streamGenerateContent request body in-place.
 /// Returns the modified JSON bytes, or None if modification wasn't possible.