MongoDB and MCP server tools not connecting via Chainlit application

[Pradhisha-289248]

Description:
I am able to run the MongoDB MCP server tools and connect to MongoDB successfully in standalone mode via port forwarding. However, when I try to query the database through the Chainlit application, neither the database nor the MCP server tools are connecting.

Steps to Reproduce:

1.Start MongoDB MCP server tools using the standard commands.
2. Confirm that tools load correctly and list available functions.

3. Connect to MongoDB using mongosh CLI:npx -y mongosh "mongodb://:@:/?authSource=admin"
4. Connection succeeds, MongoDB is accessible via CLI.

5. Attempt to query the same database via the Chainlit application.
6. The application fails to connect to MongoDB and MCP server tools.
   Expected Behavior:
   The Chainlit application should be able to connect to MongoDB and the MCP server tools just like in standalone mode.

Actual Behavior:
Connection fails when using the Chainlit application.

[github-actions]

Thanks for opening this issue. The ticket MCP-253 was created for internal tracking.

[kmruiz]

Hi @Pradhisha-289248 ,

Can you provide the MCP Server configuration with the anonymised connection string that you are using? From the list of tools you are providing, there is a "connect" tool, which leads to a possible misconfiguration. In the situation that the MCP is connected, the "connect" tool does not exist, and there is a new tool named "switch-connection".

[nirinchev]

And for some extra context - connecting to a database via mongosh would not make the mcp server connect to it - those are two separate tools that do not share state.