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rafaljanicki

X (Twitter) MCP server

by rafaljanicki

get_user_profile

Retrieve comprehensive profile details for a user on X (Twitter) by providing their user ID, enabling analysis or integration with other systems.

Instructions

Get detailed profile information for a user

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
user_idYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Implementation Reference

  • The handler function for the 'get_user_profile' tool, decorated with @server.tool for registration. It initializes the Twitter v2 client and fetches the user profile using client.get_user with specified fields, returning the user data.
    @server.tool(name="get_user_profile", description="Get detailed profile information for a user")
    async def get_user_profile(user_id: str) -> Dict:
        """Fetches user profile by user ID.
    
        Args:
            user_id (str): The ID of the user to look up.
        """
        client, _ = initialize_twitter_clients()
        user = client.get_user(id=user_id, user_fields=["id", "name", "username", "profile_image_url", "description"])
        return user.data
  • Registers the tool named 'get_user_profile' with description using the FastMCP @server.tool decorator.
    @server.tool(name="get_user_profile", description="Get detailed profile information for a user")
Behavior2/5

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It states this is a 'Get' operation, implying it is read-only, but does not specify permissions, rate limits, error conditions, or what 'detailed profile information' entails. For a tool with zero annotation coverage, this is insufficient.

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 a single, efficient sentence with no wasted words. It is front-loaded with the core purpose, making it easy for an agent to parse quickly.

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 the tool's simplicity (one parameter) and the presence of an output schema, the description is minimally adequate. However, with no annotations and unclear differentiation from siblings, it lacks completeness for optimal agent guidance, scoring at the minimum viable level.

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

Parameters3/5

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

The input schema has 0% description coverage, but the description does not add any parameter-specific information beyond implying a 'user_id' is needed. With one parameter and no schema details, the baseline is 3 as the description does not compensate for the coverage gap but also does not mislead.

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

Purpose4/5

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

The description clearly states the verb ('Get') and resource ('detailed profile information for a user'), making the purpose unambiguous. However, it does not distinguish this tool from sibling tools like 'get_user_by_id' or 'get_user_by_screen_name', which appear to serve similar user retrieval functions, preventing a score of 5.

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

Usage Guidelines2/5

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

The description provides no guidance on when to use this tool versus alternatives such as 'get_user_by_id' or 'get_user_by_screen_name'. It lacks context about prerequisites, exclusions, or specific use cases, leaving the agent to infer usage from the tool name alone.

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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