fixes tool callong

.env.example

@@ -317,6 +317,10 @@ LLM_STREAM_CHUNK_CHARS=240
 # `<tool_call>` format: the engine parses it client-side, executes the HTTP
 # request and hands the result back to the model (see src/tools.rs). The
 # tool-call block is never spoken nor shown in the chat box.
+# Runtime override without a restart: POST /api/tools with the same JSON array
+# (GET /api/tools reports the active set and its `source`). The override lives
+# in memory only — if the endpoint is never called, the LLM_TOOLS_FILE set below
+# is used, and a restart restores it. See TOOL_CALLING.md.
 # Enabled automatically when LLM_TOOLS_FILE points to a valid tool file.
 LLM_TOOLS_ENABLED=false
 # JSON file with the tool definitions (name, description, JSON schema, url,