implement-backlog-api-tool

Agent Building

Implements a new MCP tool for a Backlog API endpoint from its documentation URL (e.g. https://developer.nulab.com/docs/backlog/api/2/get-space/). Use this skill when you need to add or update a tool in this MCP server based on a Backlog API spec.

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Implement a Backlog API Tool

Overview

Implement a new MCP tool for the Backlog API endpoint documented at $ARGUMENTS.

Steps

1. Read the API spec

Fetch the documentation page using the fetch_webpage tool with the URL $ARGUMENTS and extract the following:

Identify:

HTTP Method – GET, POST, PATCH, DELETE, etc.
Endpoint path – e.g. /api/v2/space
Parameters – name, type, required/optional, description
Response fields – JSON structure returned by the API

2. Check the backlog-js client

Find the corresponding method in the backlog-js type definitions:

grep "methodName" node_modules/backlog-js/dist/types/backlog.d.ts

Replace methodName with the actual method name (e.g. getSpace, postIssue). If unsure of the name, read the full file to browse all available methods:

cat node_modules/backlog-js/dist/types/backlog.d.ts

Use the method's name and type signature as the basis for implementation.

3. Read an existing similar tool for reference

cat src/tools/getSpace.ts
cat src/handlers/builders/composeToolHandler.ts

4. Implement the tool

Create or update these files following the existing patterns:

`src/tools/<toolName>.ts`

Define the tool name, description, and input schema using zod
Map each API parameter to a zod field with an appropriate description
Set outputSchema to a Zod schema matching the API response shape (see src/types/zod/backlogOutputDefinition.ts)
Set importantFields to the subset of fields that are most relevant to the user
Implement handler to call the corresponding backlog-js client method