fixed parsing issue and better test error message

agentstack/tools/neon.json

@@ -8,4 +8,4 @@
     },
     "tools": ["create_database", "execute_sql_ddl", "run_sql_query"],
     "cta": "Create an API key at https://www.neon.tech"
-  }
+}

tests/test_tool_config.py

@@ -1,3 +1,4 @@
+import json
 import os, sys
 import unittest
 import importlib.resources
@@ -41,6 +42,10 @@ def test_all_json_configs_from_tool_name(self):
 
     def test_all_json_configs_from_tool_path(self):
         for path in get_all_tool_paths():
-            config = ToolConfig.from_json(path)
+            try:
+                config = ToolConfig.from_json(path)
+            except json.decoder.JSONDecodeError as e:
+                raise Exception(f"Failed to decode tool json at {path}. Does your tool config fit the required formatting? https://github.com/AgentOps-AI/AgentStack/blob/main/agentstack/tools/~README.md")
+
             assert config.name == path.stem
             # We can assume that pydantic validation caught any other issues