mcp-tool-builder

name	mcp-tool-builder
description	Design, build, and review MCP servers and tools for internal systems such as email, calendar, OA, document stores, CRM, issue trackers, and databases.

MCP Tool Builder

Purpose

Help teams expose internal systems to agents safely through narrow, auditable MCP tools.

Workflow

1. Identify user task, target system, auth method, data scope, and write permissions.
2. Design small tools with explicit inputs, outputs, and side effects.
3. Separate read-only tools from write/action tools.
4. Add confirmation requirements for irreversible actions.
5. Log tool calls with user, arguments, result, and correlation ID.

Checklist

• Least privilege auth.
• Input validation and output redaction.
• Rate limits and timeouts.
• Audit logs and replay safety.
• Human confirmation for email sending, approvals, deletion, and external messages.

Output

Return:

• Tool list.
• Schema definitions.
• Permission model.
• Safety checks.
• Test plan.