fix(dump): show commit date instead of release date in hermes debug (#48104)

* feat(mcp): raise default tool-call timeout 120s -> 300s

Port from openai/codex#28234. Long-running MCP tools (web fetches,
sandboxed builds, deep-research servers) routinely exceed 120s, causing
spurious timeout failures. Codex bumped its default MCP tool timeout from
120 to 300 for the same reason.

- _DEFAULT_TOOL_TIMEOUT 120 -> 300 in tools/mcp_tool.py (per-server
  'timeout' config override unchanged)
- update test_default_timeout assertion
- document the default in mcp-config-reference.md

* fix(dump): show commit date instead of release date in hermes dump

The version line in `hermes dump` (the top of the /debug report) appended
the package release date in parentheses, which reads like a wall-clock
"generated at" timestamp and confuses support triage. Replace it with the
date the HEAD commit was actually made, resolved live via
`git log -1 --format=%cd --date=short`, kept next to the commit SHA.

On Docker/wheel installs with no .git the date resolves to '' and the
suffix is simply omitted (the baked SHA still identifies the build).

hermes_cli/dump.py

@@ -56,6 +56,30 @@ def _get_git_commit(project_root: Path) -> str:
     return "(unknown)"
 
 
+def _get_git_commit_date(project_root: Path) -> str:
+    """Return the date the HEAD commit was authored (YYYY-MM-DD), or ''.
+
+    Resolves live via ``git log`` on source installs.  The published Docker
+    image excludes ``.git``, so this returns '' there — the dump line simply
+    drops the date suffix in that case (the baked SHA still identifies the
+    build).
+    """
+    try:
+        result = subprocess.run(
+            ["git", "log", "-1", "--format=%cd", "--date=short", "HEAD"],
+            capture_output=True, text=True, timeout=5,
+            cwd=str(project_root),
+        )
+        if result.returncode == 0:
+            value = result.stdout.strip()
+            if value:
+                return value
+    except Exception:
+        pass
+
+    return ""
+
+
 def _redact(value: str) -> str:
     """Redact all but first 4 and last 4 chars.
 
@@ -231,12 +255,12 @@ def run_dump(args):
     hermes_home = get_hermes_home()
 
     try:
-        from hermes_cli import __version__, __release_date__
+        from hermes_cli import __version__
     except ImportError:
         __version__ = "(unknown)"
-        __release_date__ = ""
 
     commit = _get_git_commit(project_root)
+    commit_date = _get_git_commit_date(project_root)
 
     try:
         config = load_config()
@@ -283,10 +307,14 @@ def run_dump(args):
 
     lines = []
     lines.append("--- hermes dump ---")
+    # Identify the build by commit + the date that commit was made, resolved
+    # live via git.  __release_date__ (the package release date) is
+    # intentionally NOT shown here — it reads like a wall-clock timestamp and
+    # confuses support triage.  The commit date is the real "as-of" date.
     ver_str = f"{__version__}"
-    if __release_date__:
-        ver_str += f" ({__release_date__})"
     ver_str += f" [{commit}]"
+    if commit_date:
+        ver_str += f" ({commit_date})"
     lines.append(f"version:          {ver_str}")
     lines.append(f"os:               {os_info}")
     lines.append(f"python:           {sys.version.split()[0]}")