Errors with MCP schema

[grant-mccarriagher]

Hey all,

I know this is still under active development, but I'm getting errors related to function schemas when attempting to use this MCP with LLM clients. Here are the ones I've run into so far:

1. Unable to submit request because run_auto_analysis functionDeclaration parameters.analyzer_item_modes schema specified incorrect schema type field. For schema with enum values, schema type should not be OBJECT or ARRAY. Learn more: https://cloud.google.com/vertex-ai/generative-ai/docs/multimodal/function-calling. Changing analyzer_item_modes to use mcp.DefaultString() instead of mcp.DefaultArray() seems to fix this.
2. list_test_items_by_filter has the parameter launch-id, which the LLM is consistently trying to call with launch_id. Changing it to launch_id fixes things.

I thought this might just be the client/LLM I'm using, but it seems consistent across different models and clients. If these seem like valid changes, please let me know and I can get a PR created, and if not, let me know if there's any further info I can provide.

[AmsterGet]

Hello @grant-mccarriagher !
Thanks for your findings.
@AleksandrParamonoff could you please take a look?

[AleksandrParamonoff]

Hello, @grant-mccarriagher,
Thanks for your feedback. In general, the MCP server does not have the task of completely repeating the Report Portal interface, it is rather a proxy that is designed to help solve the most frequently used use cases. We recently released the first version(1.0.0) of MCP server, so you can try to use it. If the error occurs again, please provide more information about your MCP server use case, what specific requests to Report Portal cause the error. Also, please specify the version of Report Portal and MCP server that you are currently using.

[grant-mccarriagher]

@AleksandrParamonoff This can be reproduced in GitHub Copilot, with the following MCP config (which uses the version of RP MCP on Dockerhub):

"reportportal": {
			"command": "docker",
			"args": [
				"run",
				"-i",
				"--rm",
				"-e",
				"RP_API_TOKEN",
				"-e",
				"RP_HOST",
				"-e",
				"RP_PROJECT",
				"reportportal/mcp-server"
			],
			"env": {
				"RP_HOST": "valid_host",
				"RP_API_TOKEN": "valid_token"
			}
		}

If you then ask Copilot in agent mode something like:

please give me a brief summary of report portal launch 443375 in the "ios" project

You'll get the response:

Failed to validate tool mcp_reportportal_run_auto_analysis: Error: tool parameters array type must have items. Please open a Github issue for the MCP server or extension which provides this tool

Copilot complains like this regardless of the RP server version (since it's complaining about the schema of the MCP server). I get this same error through other tools like LLM gateways to various other LLMs. If you manually disable the analysis tool (or make the change I described in the original post), this error goes away.