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authenticate_account

Initiate device flow authentication for a Microsoft account, providing a URL and code for user verification to enable access to Microsoft Graph API services.

Instructions

Authenticate a new Microsoft account using device flow authentication

Returns authentication instructions and device code for the user to complete authentication. The user must visit the URL and enter the code to authenticate their Microsoft account.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Implementation Reference

  • The handler function for the 'authenticate_account' tool. It initiates the MSAL device flow authentication, generates a device code and verification URL, and returns structured instructions for the user to complete the authentication process.
    @mcp.tool
    def authenticate_account() -> dict[str, str]:
        """Authenticate a new Microsoft account using device flow authentication
    
        Returns authentication instructions and device code for the user to complete authentication.
        The user must visit the URL and enter the code to authenticate their Microsoft account.
        """
        app = auth.get_app()
        flow = app.initiate_device_flow(scopes=auth.SCOPES)
    
        if "user_code" not in flow:
            error_msg = flow.get("error_description", "Unknown error")
            raise Exception(f"Failed to get device code: {error_msg}")
    
        verification_url = flow.get(
            "verification_uri",
            flow.get("verification_url", "https://microsoft.com/devicelogin"),
        )
    
        return {
            "status": "authentication_required",
            "instructions": "To authenticate a new Microsoft account:",
            "step1": f"Visit: {verification_url}",
            "step2": f"Enter code: {flow['user_code']}",
            "step3": "Sign in with the Microsoft account you want to add",
            "step4": "After authenticating, use the 'complete_authentication' tool to finish the process",
            "device_code": flow["user_code"],
            "verification_url": verification_url,
            "expires_in": flow.get("expires_in", 900),
            "_flow_cache": str(flow),
        }
Behavior3/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations provided, the description carries the full burden of behavioral disclosure. It explains the tool initiates device flow authentication and returns instructions/codes, which covers the core behavior. However, it lacks details on error handling, rate limits, authentication scopes, or what happens if authentication fails, leaving gaps for a mutation tool (authentication typically involves state changes).

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is front-loaded with the core purpose in the first sentence, followed by essential details about returns and user actions in two additional sentences. Every sentence adds value without redundancy, making it efficient and well-structured for quick understanding.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given no annotations and no output schema, the description provides basic context on what the tool does and its output (instructions and device code). However, for an authentication tool that likely involves state changes and user interaction, it lacks details on success/failure outcomes, token storage, or integration with sibling tools like 'complete_authentication', making it minimally adequate but incomplete.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The input schema has 0 parameters with 100% coverage, so no parameter documentation is needed. The description appropriately does not discuss parameters, focusing instead on the tool's purpose and output. This meets the baseline for tools with no parameters, as it avoids unnecessary details.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the specific action ('authenticate a new Microsoft account') and method ('using device flow authentication'), distinguishing it from sibling tools like 'complete_authentication' which likely handles a different authentication phase. It precisely identifies both the verb and resource without being tautological.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description implies usage context by explaining that this tool initiates authentication and returns instructions for user completion, suggesting it should be used at the start of an authentication workflow. However, it does not explicitly state when to use this versus alternatives like 'complete_authentication' or other account-related tools, nor does it provide exclusions or prerequisites.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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