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guillochon

mlb-api-mcp

get_current_date

Retrieve the current date in YYYY-MM-DD format for use with MLB statistics and baseball data operations.

Instructions

Get the current date.

Returns: str: The current date in YYYY-MM-DD format

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes

Implementation Reference

  • The handler function for the 'get_current_date' MCP tool. It uses @mcp.tool() decorator to define and register the tool logic, returning the current date in YYYY-MM-DD format or an error message.
    @mcp.tool()
    def get_current_date() -> str:
        """Get the current date.
    
        Returns:
            str: The current date in YYYY-MM-DD format
        """
        try:
            current_date = datetime.now().strftime("%Y-%m-%d")
            return current_date
        except Exception as e:
            return f"Error getting current date: {e!s}"
  • main.py:23-23 (registration)
    The call to setup_generic_tools(mcp) in the main server setup, which executes the tool definitions including get_current_date.
    setup_generic_tools(mcp)
  • The docstring in the get_current_date handler defines the tool's description and output schema (str in YYYY-MM-DD format).
    """Get the current date.
    
    Returns:
        str: The current date in YYYY-MM-DD format
    """
  • The setup_generic_tools function that contains the definitions of generic tools including get_current_date.
    def setup_generic_tools(mcp):
        """Setup generic tools for the MCP server"""
Behavior3/5

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

No annotations are provided, so the description carries the full burden. It discloses the return format ('YYYY-MM-DD format') and that it returns a string, which adds useful behavioral context. However, it does not mention potential issues like timezone handling, freshness of data, or error conditions, leaving some behavioral aspects unspecified.

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 extremely concise and well-structured, with two sentences that efficiently convey the purpose and return format without any wasted words. It is front-loaded with the main action and follows with necessary details, making it easy to understand quickly.

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

Completeness5/5

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

Given the tool's simplicity (0 parameters, no annotations, but has an output schema), the description is complete enough. It explains what the tool does and the return format, and since an output schema exists, it does not need to detail return values further. The description adequately covers all necessary context for this straightforward tool.

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 tool has 0 parameters, and schema description coverage is 100%, so no parameter documentation is needed. The description does not add parameter semantics beyond the schema, but since there are no parameters, this is acceptable. A baseline of 4 is appropriate as the description compensates by being complete for a parameterless tool.

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 tool's purpose with a specific verb ('Get') and resource ('the current date'), and it distinguishes itself from sibling tools like 'get_current_time' by focusing specifically on date rather than time. The description is precise and unambiguous about what the tool does.

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 specifying that it returns the current date, which suggests it should be used when the current date is needed. However, it does not explicitly state when to use this tool versus alternatives like 'get_current_time' or provide any exclusions. The context is clear but lacks explicit guidance on tool selection.

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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