memo-mcp

Instructions

Implementation Reference

• src/server/tools.ts:126-139 (handler)

  MCP tool handler for 'deleteMemo' that invokes the repository function, handles cases where memo is not found, and returns formatted text and structured content.

  async ({ id }) => {
    const deletedMemo = await deleteMemo(id)
    if (!deletedMemo) {
      return {
        content: [{ text: "Memo not found", type: "text" }],
        isError: true,
      }
    }
  
    return {
      content: [{ text: JSON.stringify(deletedMemo), type: "text" }],
      structuredContent: { memo: deletedMemo },
    }
  },

• src/server/tools.ts:118-125 (schema)

  Input and output schema definition for the deleteMemo tool, specifying id parameter and memo output.

  {
    description: "Delete a memo",
    inputSchema: {
      id: z.string().describe("The ID of the memo"),
    },
    outputSchema: { memo: MemoSchema },
    title: "Delete Memo",
  },

• src/server/tools.ts:116-140 (registration)

  Registration of the 'deleteMemo' tool on the MCP server using server.registerTool.

  server.registerTool(
    "deleteMemo",
    {
      description: "Delete a memo",
      inputSchema: {
        id: z.string().describe("The ID of the memo"),
      },
      outputSchema: { memo: MemoSchema },
      title: "Delete Memo",
    },
    async ({ id }) => {
      const deletedMemo = await deleteMemo(id)
      if (!deletedMemo) {
        return {
          content: [{ text: "Memo not found", type: "text" }],
          isError: true,
        }
      }
  
      return {
        content: [{ text: JSON.stringify(deletedMemo), type: "text" }],
        structuredContent: { memo: deletedMemo },
      }
    },
  )

• src/repository/memos.ts:51-62 (helper)

  Repository helper function that performs the actual deletion of a memo by ID from the in-memory database and returns the deleted memo.

  export const deleteMemo = async (id: string) => {
    await db.read()
  
    const index = db.data.memos.findIndex((memo) => memo.id === id)
    if (index == -1) {
      return undefined
    }
  
    const [deletedMemo] = db.data.memos.splice(index, 1)
    await db.write()
    return deletedMemo
  }