feat(agent-toolkit): add workflow-builder read tools (get_workflow / list_workflows)

[jonathanHeiss1]

Summary

Adds two read-only MCP tools that expose standalone, workspace-level workflows (Workflow Builder — distinct from board automations) through the workflow-builder subgraph on the dev GraphQL API version, following the same pattern as the existing list_automations tool and the workflow-builder-tools family (create_workflow, etc.):

• get_workflow (READ) — fetch one or more workflows by workflow object ID, returning metadata + the ordered list of steps. IDs that don't resolve are omitted.
• list_workflows (READ) — cursor-paginated list of the account's live (published) workflows.

Both call workflows(ids) / live_workflows_page(pagination) via mondayApi.request(..., { versionOverride: 'dev' }) and share a single read-model mapper so they return identical workflow shapes (id, title, description, active, created_at, updated_at, steps[{ node_id, block_reference_id, title }]).

Why

When a user interacts with the platform MCP there is currently no way to read a Workflow Builder workflow's definition — create/update/plan/publish_workflow exist, but no get/list. This closes that gap, mirroring how automations already have list_automations.

Notes

• Access remains gated server-side on the dev API (the ENABLE_EXTERNAL_WORKFLOW_GRAPHQL_API flag from feat(agent-toolkit): add workflows tools (list/activate/deactivate/delete) #346); no client-side flag is added, matching the existing create_workflow tool.
• Reuses the already-generated graphql.dev types (WorkflowAutomation, LiveWorkflowAutomationsPage, WorkflowAutomationsPaginationInput).

Test plan

• yarn jest — 14 new unit tests pass (id→variable mapping, null filtering, pagination cursor/hasMore, versionOverride: 'dev', zod validation, error paths)
• eslint — clean on all new/changed files
• tsc --noEmit — no new errors (the two pre-existing TS2589 errors in src/mcp/toolkit.ts reproduce on clean master)
• Local MCP smoke test against an account with ENABLE_EXTERNAL_WORKFLOW_GRAPHQL_API enabled

Made with Cursor