Fix mail counts and finance ranges found testing live

- mail printed threads and the model called them emails; it now
  reports messages and threads.
- finance spending takes a since date (default the first of the month)
  instead of a day count, and an optional asset account. The
  per-account listing needs an end date or the API rejects it; an
  unknown account name gets the user's accounts back.
- Tool errors are capped at 2000 characters like normal output.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 31 insertions, 0 deletions

diff --git a/AGENTS.md b/AGENTS.md
index 51a46d3..bfc29f4 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -331,6 +331,37 @@ distance, a person, next appointment twice).
 - `agenda.py` matched khal's listing over 7 and 60 days on the real vdir,
   runs in ~60 ms.
 
+### More tools, live test (2026-09-26)
+
+`calc` (qalc), `mail` (mailctl search), `playing` (playerctl/mpc),
+`finance` (firefly list commands). Every command is fixed in its tool
+file: the model fills parameters but cannot reach `mailctl tag` or
+`firefly tx add`.
+
+- qalc reads "17.5% of 240" as a modulo. With the hint "percent as a
+  factor: 240 * 17.5%" the model sent exactly that and got 42.
+- "Days until Christmas": the model built `days(<today>; 2026-12-25)`
+  from the date in the system prompt, right in one call (1.9 s).
+- mail said "47 unread emails" for 47 *threads* (58 messages). The tool
+  now prints "N messages in M threads".
+- finance "this month" used the 30-day default and the model called it
+  the month's total. Spending now takes a `since` date, empty = first of
+  the month.
+- "Spent on account X" had no account filter: the model fetched balances
+  plus total spending and honestly said it could not split them. Added
+  `account`; firefly's per-account listing needs `--until` or the API
+  answers 422. An unknown name gets the user's asset accounts back (not
+  firefly's own error, which lists every expense account); tool errors
+  are now capped at 2000 characters like normal output.
+- The model passed a lowercase account name; matching is
+  case-insensitive, firefly accepted it.
+- First sentence 1.9-3.6 s with local tools, ~5-6.6 s with firefly
+  (two API calls when filtering by account).
+- STT misheard "mail" as "snail"; the model answered about a snail,
+  harmless for read-only tools. Phase 2 (modifying tools) needs
+  confirmation before acting for exactly this reason.
+- These tools speak personal data (mail subjects, amounts) out loud.
+
 ### TTS (2026-09-25)
 
 `piper-tts` on CPU (onnxruntime), ~5 s sentence per voice: