[MCP] Read resource assumes a directory structure #262368
Description
Does this issue occur when all extensions are disabled?: Yes
- VS Code Version: 1.103.1
- OS Version: Windows_NT x64 10.0.26100
I've developed an MCP server that allows users to read resources, in this case a list of "available datasets" in a proprietary system. The server returns a list of datasets, each with an attached uri to get further details on that dataset.
When this resource is browsed, VS Code assumes that it is a directory, and rather than listing the datasets (as expected) and allowing Copilot to request further information on the dataset via the provided uri, it assumes that it is a directory. It then displays:
In Copilot itself, it assumes that the resulting URIs are files in a directory that it doesn't have access to and does not return further information on the dataset.
In Claude it behaves as expected, listing the available datasets and returning further information on request:
Steps to Reproduce:
- Enable an MCP server that has
resources/read - MCP server returns further non-directory resources
- Output is interpreted as a directory, and no information is displayed
2025-08-19 20:16:52.808 [debug] [editor -> server] {"jsonrpc":"2.0","id":5,"method":"resources/read","params":{"uri":"dpella://datasets"}}
2025-08-19 20:16:52.808 [debug] [editor -> server] {"jsonrpc":"2.0","id":6,"method":"resources/read","params":{"uri":"dpella://datasets"}}
2025-08-19 20:16:52.915 [debug] [server -> editor] {"id":6,"jsonrpc":"2.0","result":{"contents":[{"mimeType":"text/plain","name":"transactions","text":"transactions","uri":"dpella://datasets/transactions"}]}}
2025-08-19 20:16:52.915 [debug] [editor -> server] {"jsonrpc":"2.0","id":7,"method":"resources/read","params":{"uri":"dpella://datasets"}}
2025-08-19 20:16:52.929 [debug] [server -> editor] {"id":5,"jsonrpc":"2.0","result":{"contents":[{"mimeType":"text/plain","name":"transactions","text":"transactions","uri":"dpella://datasets/transactions"}]}}
2025-08-19 20:16:52.957 [debug] [server -> editor] {"id":7,"jsonrpc":"2.0","result":{"contents":[{"mimeType":"text/plain","name":"transactions","text":"transactions","uri":"dpella://datasets/transactions"}]}}
2025-08-19 20:16:52.958 [debug] [editor -> server] {"jsonrpc":"2.0","id":8,"method":"resources/read","params":{"uri":"dpella://datasets/transactions"}}
2025-08-19 20:16:53.056 [debug] [server -> editor] {"id":8,"jsonrpc":"2.0","result":{"contents":[{"mimeType":"text/plain","name":"transactions","text":"[Information about transactions]","uri":"dpella://datasets/transactions"}]}}