Custom tool descriptions (#29)

* Allow setting up the tool descriptions with env variables

* Document the env variables as a table in README

* Link settings.py in README.md

* Allow to choose transport protocol: stdio or sse

* Fix metadata handling in Cursor

* Improve README to cover more cases

* Add info about Cursor rules

* Fix Github note type

tests/test_settings.py

@@ -0,0 +1,109 @@
+import os
+from unittest.mock import patch
+
+import pytest
+
+from mcp_server_qdrant.embeddings.types import EmbeddingProviderType
+from mcp_server_qdrant.settings import (
+    DEFAULT_TOOL_FIND_DESCRIPTION,
+    DEFAULT_TOOL_STORE_DESCRIPTION,
+    EmbeddingProviderSettings,
+    QdrantSettings,
+    ToolSettings,
+)
+
+
+class TestQdrantSettings:
+    def test_default_values(self):
+        """Test that required fields raise errors when not provided."""
+        with pytest.raises(ValueError):
+            # Should raise error because required fields are missing
+            QdrantSettings()
+
+    @patch.dict(
+        os.environ,
+        {"QDRANT_URL": "http://localhost:6333", "COLLECTION_NAME": "test_collection"},
+    )
+    def test_minimal_config(self):
+        """Test loading minimal configuration from environment variables."""
+        settings = QdrantSettings()
+        assert settings.location == "http://localhost:6333"
+        assert settings.collection_name == "test_collection"
+        assert settings.api_key is None
+        assert settings.local_path is None
+
+    @patch.dict(
+        os.environ,
+        {
+            "QDRANT_URL": "http://qdrant.example.com:6333",
+            "QDRANT_API_KEY": "test_api_key",
+            "COLLECTION_NAME": "my_memories",
+            "QDRANT_LOCAL_PATH": "/tmp/qdrant",
+        },
+    )
+    def test_full_config(self):
+        """Test loading full configuration from environment variables."""
+        settings = QdrantSettings()
+        assert settings.location == "http://qdrant.example.com:6333"
+        assert settings.api_key == "test_api_key"
+        assert settings.collection_name == "my_memories"
+        assert settings.local_path == "/tmp/qdrant"
+
+
+class TestEmbeddingProviderSettings:
+    def test_default_values(self):
+        """Test default values are set correctly."""
+        settings = EmbeddingProviderSettings()
+        assert settings.provider_type == EmbeddingProviderType.FASTEMBED
+        assert settings.model_name == "sentence-transformers/all-MiniLM-L6-v2"
+
+    @patch.dict(
+        os.environ,
+        {"EMBEDDING_MODEL": "custom_model"},
+    )
+    def test_custom_values(self):
+        """Test loading custom values from environment variables."""
+        settings = EmbeddingProviderSettings()
+        assert settings.provider_type == EmbeddingProviderType.FASTEMBED
+        assert settings.model_name == "custom_model"
+
+
+class TestToolSettings:
+    def test_default_values(self):
+        """Test that default values are set correctly when no env vars are provided."""
+        settings = ToolSettings()
+        assert settings.tool_store_description == DEFAULT_TOOL_STORE_DESCRIPTION
+        assert settings.tool_find_description == DEFAULT_TOOL_FIND_DESCRIPTION
+
+    @patch.dict(
+        os.environ,
+        {"TOOL_STORE_DESCRIPTION": "Custom store description"},
+    )
+    def test_custom_store_description(self):
+        """Test loading custom store description from environment variable."""
+        settings = ToolSettings()
+        assert settings.tool_store_description == "Custom store description"
+        assert settings.tool_find_description == DEFAULT_TOOL_FIND_DESCRIPTION
+
+    @patch.dict(
+        os.environ,
+        {"TOOL_FIND_DESCRIPTION": "Custom find description"},
+    )
+    def test_custom_find_description(self):
+        """Test loading custom find description from environment variable."""
+        settings = ToolSettings()
+        assert settings.tool_store_description == DEFAULT_TOOL_STORE_DESCRIPTION
+        assert settings.tool_find_description == "Custom find description"
+
+    @patch.dict(
+        os.environ,
+        {
+            "TOOL_STORE_DESCRIPTION": "Custom store description",
+            "TOOL_FIND_DESCRIPTION": "Custom find description",
+        },
+    )
+    def test_all_custom_values(self):
+        """Test loading all custom values from environment variables."""
+        settings = ToolSettings()
+        assert settings.tool_store_description == "Custom store description"
+        assert settings.tool_find_description == "Custom find description"