EasyAuth returns 403 forbidden

I have made some changes to try use EasyAuth instead of function key. Copilot suggested using the same app registration so that has been my main attempt. I get everything working except at the very end, it returns 403 when trying to get the list of MCP tools after getting authenticated. The error in the function app:
```
2025-07-18T21:54:34Z [Information] Authorization failed. These requirements were not met:
Handler assertion should evaluate to true.
2025-07-18T21:54:34Z [Information] Executing ForbidResult with authentication schemes (WebJobsAuthLevel, Bearer).
2025-07-18T21:54:34Z [Information] AuthenticationScheme: WebJobsAuthLevel was forbidden.
```

I also made changes to persist the ClientInfo by adding http endpoints to store and fetch the client information. These http endpoints are in the same function app and they do not get rejected. Why do only the MCP endpoints fail the authentication scheme with the exact same token?

Start by comparing authentication for the MCP endpoints with the HTTP endpoints used to store and fetch ClientInfo, then reproduce the tools-list request and inspect the shown function-app authorization logs. Done means the same token is accepted for the MCP request without the WebJobsAuthLevel forbid response.

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