fix: refine tool summaries and scope discord tool

docs/discord.md

@@ -28,6 +28,7 @@ Status: ready for DM and guild text channels via the official Discord bot gatewa
 9. Optional slash commands: enable `discord.slashCommand` to accept user-installed app commands (ephemeral replies). Slash invocations respect the same DM/guild allowlists.
 10. Optional guild context history: set `discord.historyLimit` (default 20) to include the last N guild messages as context when replying to a mention. Set `0` to disable.
 11. Reactions: the agent can trigger reactions via the `discord` tool (gated by `discord.actions.*`).
+    - The `discord` tool is only exposed when the current surface is Discord.
 12. Slash commands use isolated session keys (`${sessionPrefix}:${userId}`) rather than the shared `main` session.
 
 Note: Discord does not provide a simple username → id lookup without extra guild context, so prefer ids or `<@id>` mentions for DM delivery targets.

docs/thinking.md

@@ -32,7 +32,7 @@ read_when:
 - Levels: `on|full` or `off` (default).
 - Directive-only message toggles session verbose and replies `Verbose logging enabled.` / `Verbose logging disabled.`; invalid levels return a hint without changing state.
 - Inline directive affects only that message; session/global defaults apply otherwise.
-- When verbose is on, agents that emit structured tool results (Pi, other JSON agents) send each tool result back as its own metadata-only message, prefixed with `[🛠️ <tool-name> <arg>]` when available (path/command); the tool output itself is not forwarded. These tool summaries are sent as soon as each tool finishes (separate bubbles), not as streaming deltas. If you toggle `/verbose on|off` while a run is in-flight, subsequent tool bubbles honor the new setting.
+- When verbose is on, agents that emit structured tool results (Pi, other JSON agents) send each tool result back as its own metadata-only message, prefixed with `<emoji> <tool-name>: <arg>` when available (path/command); the tool output itself is not forwarded. These tool summaries are sent as soon as each tool finishes (separate bubbles), not as streaming deltas. If you toggle `/verbose on|off` while a run is in-flight, subsequent tool bubbles honor the new setting.
 
 ## Heartbeats
 - Heartbeat probe body is `HEARTBEAT`. Inline directives in a heartbeat message apply as usual (but avoid changing session defaults from heartbeats).

docs/tools.md

@@ -143,6 +143,7 @@ Notes:
 - `reactions` returns per-emoji user lists (limited to 100 per reaction).
 - `discord.actions.*` gates Discord tool actions; `roles` + `moderation` default to `false`.
 - `searchMessages` follows the Discord preview spec (limit max 25, channel/author filters accept arrays).
+- The tool is only exposed when the current surface is Discord.
 
 ## Parameters (common)