docs: document verbose-gated tool error details

CHANGELOG.md

@@ -18,6 +18,7 @@ Docs: https://docs.openclaw.ai
 - **BREAKING:** remove legacy Gateway device-auth signature `v1`. Device-auth clients must now sign `v2` payloads with the per-connection `connect.challenge` nonce and send `device.nonce`; nonce-less connects are rejected.
 - **BREAKING:** unify channel preview-streaming config to `channels.<channel>.streaming` with enum values `off | partial | block | progress`, and move Slack native stream toggle to `channels.slack.nativeStreaming`. Legacy keys (`streamMode`, Slack boolean `streaming`) are still read and migrated by `openclaw doctor --fix`, but canonical saved config/docs now use the unified names.
 - **BREAKING:** CLI local onboarding now sets `session.dmScope` to `per-channel-peer` by default for new/implicit DM scope configuration. If you depend on shared DM continuity across senders, explicitly set `session.dmScope` to `main`. (#23468) Thanks @bmendonca3.
+- **BREAKING:** tool-failure replies now hide raw error details by default. OpenClaw still sends a failure summary, but detailed error suffixes (for example provider/runtime messages and local path fragments) now require `/verbose on` or `/verbose full`.
 
 ### Fixes
 

docs/tools/slash-commands.md

@@ -126,6 +126,7 @@ Notes:
 - Discord-only native command: `/vc join|leave|status` controls voice channels (requires `channels.discord.voice` and native commands; not available as text).
 - Discord thread-binding commands (`/focus`, `/unfocus`, `/agents`, `/session ttl`) require effective thread bindings to be enabled (`session.threadBindings.enabled` and/or `channels.discord.threadBindings.enabled`).
 - `/verbose` is meant for debugging and extra visibility; keep it **off** in normal use.
+- Tool failure summaries are still shown when relevant, but detailed failure text is only included when `/verbose` is `on` or `full`.
 - `/reasoning` (and `/verbose`) are risky in group settings: they may reveal internal reasoning or tool output you did not intend to expose. Prefer leaving them off, especially in group chats.
 - **Fast path:** command-only messages from allowlisted senders are handled immediately (bypass queue + model).
 - **Group mention gating:** command-only messages from allowlisted senders bypass mention requirements.

docs/tools/thinking.md

@@ -47,6 +47,7 @@ title: "Thinking Levels"
 - Inline directive affects only that message; session/global defaults apply otherwise.
 - Send `/verbose` (or `/verbose:`) with no argument to see the current verbose level.
 - When verbose is on, agents that emit structured tool results (Pi, other JSON agents) send each tool call back as its own metadata-only message, prefixed with `<emoji> <tool-name>: <arg>` when available (path/command). These tool summaries are sent as soon as each tool starts (separate bubbles), not as streaming deltas.
+- Tool failure summaries remain visible in normal mode, but raw error detail suffixes are hidden unless verbose is `on` or `full`.
 - When verbose is `full`, tool outputs are also forwarded after completion (separate bubble, truncated to a safe length). If you toggle `/verbose on|full|off` while a run is in-flight, subsequent tool bubbles honor the new setting.
 
 ## Reasoning visibility (/reasoning)