UpdateConfluencePage unreliable for ~18–22KB markdown bodies via Rovo MCP (Cursor agent workflow)

[Isaac Guerrero]

Product: Rovo MCP / Confluence (updateConfluencePage)

Describe the issue:
 Automating updates to a compact Confluence mirror page (~18KB markdown) via the MCP plugin. Local prep validates payload (sentinels present, body_len ~18187). Single updateConfluencePage call with contentFormat: markdown should replace the page body.

Problems observed (via Cursor agent):

• Required at body when body missing/truncated in tool invocation
• Partial uploads (header only) when body truncated in transit
• Poor ergonomics: full-page replace only — no file indirection; agents struggle to inline 18KB+ reliably in one tool call

Repro:

1. Build markdown body ~18KB (rolling task list mirror)
2. Call updateConfluencePage with cloudId, pageId, contentFormat: markdown, versionMessage, full body
3. From Cursor agent: call often fails or never completes; direct MCP with complete args works inconsistently

Expected: Reliable full-body replace for ~20KB markdown pages; clear max-size docs and errors.

Actual: Fragile enough that we disabled auto-mirror and paste manually.

Request: Document max body size; better errors on truncation; consider granular edits / chunked update for large pages (I saw v2 granular edit preview mentioned in community — does that cover this?).

Cloud: Atlassian Cloud (rocket-lawyer.atlassian.net)

Tool: updateConfluencePage via Cursor Atlassian MCP plugin (OAuth)