Small RC Fixes (#608)

* mentioning ollama on the docs as embedder

* lowering barrier to match tool with simialr name

* Fixing agent tools to support co_worker

* Adding new tests

* Fixing type"

* updating tests

* fixing conflict

docs/tools/JSONSearchTool.md

@@ -48,7 +48,7 @@ tool = JSONSearchTool(
             },
         },
         "embedder": {
-            "provider": "google",
+            "provider": "google", # or openai, ollama, ...
             "config": {
                 "model": "models/embedding-001",
                 "task_type": "retrieval_document",