Unleash MCP (Feature Toggle)

Instructions

Implementation Reference

• src/tools/list-flags.ts:6-46 (handler)

  The main handler function for the listFlags tool. Fetches all feature flags using getAllFeatureFlags and returns them as formatted JSON response, handling errors appropriately.

  async function handleListFlags() {
    try {
      // Get all feature flags
      const flags = await getAllFeatureFlags();
      
      if (!flags) {
        return {
          content: [{ 
            type: "text", 
            text: JSON.stringify({ 
              success: false,
              error: "Failed to fetch feature flags" 
            }, null, 2)
          }],
          isError: true
        };
      }
      
      return {
        content: [{ 
          type: "text", 
          text: JSON.stringify({ 
            success: true,
            count: flags.length,
            flags: flags
          }, null, 2)
        }]
      };
    } catch (error: any) {
      return {
        content: [{ 
          type: "text", 
          text: JSON.stringify({ 
            success: false,
            error: error.message 
          }, null, 2)
        }],
        isError: true
      };
    }
  }

• src/tools/list-flags.ts:51-55 (schema)

  Tool definition object for listFlags, specifying name, description, and reference to the handler function. Note: no input parameters schema as the tool takes no arguments.

  export const listFlags = {
    name: "listFlags",
    description: "Get a list of all feature flags",
    handler: handleListFlags
  }; 

• src/server.ts:177-181 (registration)

  Registration of the listFlags tool with the MCP server using server.tool().

  server.tool(
    listFlags.name,
    listFlags.description,
    listFlags.handler as any
  );