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Dataverse MCP Server fails with Name isn't valid. 'Actions' isn't recognized.'

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Posted on by donniekerr

I have a simple agents that uses a single tool, the Dataverse MCP Server. Any prompt returns this error. Is this a bug or can it be fixed with settings or instructions?

Error Message: The expression on the 'ExpressionSegment' node at '' failed with the following errors: 'Name isn't valid. 'Actions' isn't recognized.' (.Actions),

'The '.' operator cannot be used on Error values.' (.'cra2d_centricCrmAgent.action.MicrosoftDataverse-DataverseMCPServer'),

'The '.' operator cannot be used on Error values.' (.DisplayName). Error Code: ContentValidationError Conversation Id: f8eb90b5-7780-4771-8120-bc188542e42f Time (UTC): 2025-07-18T15:49:50.659Z

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Model context protocol

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Michael E. Gernaey 53,433 Super User 2025 Season 2 on at

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Hi @donniekerr

Please share your Agent, the configuration and how you are using the MCP Server. Share your Tool etc.

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donniekerr 59 on at

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This is a bug with the the new forward slash / tagging in the agent instructions. If I tag the MCP Server using / this error occurs. If I remove the tag, the error does not occur.

I won't tag this as answered in case Microsoft has a solution but it is working for me now.

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donniekerr 59 on at

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This is definitely a bug with the Copilot Studio tool, agent, etc. tagging feature inside the Instructions. As soon as you tag anything, it throws this error. It is not specific to Dataverse MCP Server.

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Michael E. Gernaey 53,433 Super User 2025 Season 2 on at

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Hi @donniekerr

It would be great if you had time to create a bug, as Microsoft will not look here and see this and its great information.

Heck even just open an M365 ticket in the admin and give them the information.

Great info, thanks for sharing

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