pulseengine_mcp_macros

Attribute Macro mcp_prompt

Source 
#[mcp_prompt]
Expand description

Automatically generates MCP prompt definitions from Rust functions.

This macro transforms regular Rust functions into MCP prompts with automatic argument validation and prompt message generation.

§Basic Usage

ⓘ
use pulseengine_mcp_macros::mcp_prompt;

#[mcp_prompt(name = "code_review")]
async fn generate_code_review(&self, code: String, language: String) -> Result<PromptMessage, Error> {
    // Generate prompt for code review
}

§With Custom Configuration

ⓘ
#[mcp_prompt(
    name = "sql_query_helper",
    description = "Generate SQL queries based on natural language",
    arguments = ["description", "table_schema", "output_format"]
)]
async fn sql_helper(&self, description: String, table_schema: String, output_format: String) -> Result<PromptMessage, Error> {
    // Implementation
}

§Parameters

  • name: Optional custom prompt name (defaults to function name)
  • description: Optional custom description (defaults to doc comments)
  • arguments: Optional array of argument names for documentation

§Features

  • Argument Validation: Automatic validation of prompt arguments
  • Type Safety: Compile-time validation of parameter types
  • Auto-Documentation: Uses function doc comments as prompt descriptions
  • Error Handling: Converts function errors to MCP protocol errors
  • Schema Generation: Automatic argument schema generation

§References