Optimize tool summarization (#7938)

Co-authored-by: Michael Neale <michael.neale@gmail.com>
Co-authored-by: Douwe Osinga <douwe@squareup.com>

crates/goose/src/providers/claude_code.rs

@@ -637,6 +637,10 @@ impl Provider for ClaudeCodeProvider {
         &self.name
     }
 
+    fn manages_own_context(&self) -> bool {
+        true
+    }
+
     fn get_model_config(&self) -> ModelConfig {
         self.model.clone()
     }