fix(ollama): harden native provider routing

docs/providers/ollama.md

@@ -318,6 +318,10 @@ Once configured, all your Ollama models are available:
 }
 ```
 
+Custom Ollama provider ids are also supported. When a model ref uses the active
+provider prefix, such as `ollama-spark/qwen3:32b`, OpenClaw strips only that
+prefix before calling Ollama so the server receives `qwen3:32b`.
+
 ## Ollama Web Search
 
 OpenClaw supports **Ollama Web Search** as a bundled `web_search` provider.
@@ -437,7 +441,8 @@ For the full setup and behavior details, see [Ollama Web Search](/tools/ollama-s
   <Accordion title="Memory embeddings">
     The bundled Ollama plugin registers a memory embedding provider for
     [memory search](/concepts/memory). It uses the configured Ollama base URL
-    and API key.
+    and API key, calls Ollama's current `/api/embed` endpoint, and batches
+    multiple memory chunks into one `input` request when possible.
 
     | Property      | Value               |
     | ------------- | ------------------- |

docs/tools/ollama-search.md

@@ -78,18 +78,22 @@ If no explicit Ollama base URL is set, OpenClaw uses `http://127.0.0.1:11434`.
 
 If your Ollama host expects bearer auth, OpenClaw reuses
 `models.providers.ollama.apiKey` (or the matching env-backed provider auth)
-for web-search requests too.
+for requests to that configured host.
 
 ## Notes
 
 - No web-search-specific API key field is required for this provider.
 - If the Ollama host is auth-protected, OpenClaw reuses the normal Ollama
   provider API key when present.
+- If the configured host does not expose web search and `OLLAMA_API_KEY` is set,
+  OpenClaw can fall back to `https://ollama.com/api/web_search` without sending
+  that env key to the local host.
 - OpenClaw warns during setup if Ollama is unreachable or not signed in, but
   it does not block selection.
 - Runtime auto-detect can fall back to Ollama Web Search when no higher-priority
   credentialed provider is configured.
-- The provider uses Ollama's `/api/web_search` endpoint.
+- The provider tries Ollama's `/api/web_search` endpoint first, then the legacy
+  `/api/experimental/web_search` endpoint for older hosts.
 
 ## Related