Update a page by id. Either replace the whole content, or apply surgical edits=[{find,replace}] to the existing content. Fields you omit are preserved (the current page is fetched first), so metadata-only updates never wipe content/tags.
AI agents use wiki_page_update to create or update resources in Mcp Wikijs Mv — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Mcp Wikijs Mv environment.
This tool modifies existing wiki page content and/or metadata. It is reversible in principle (prior content could be restored), so it falls under Write rather than Destructive. However, severity is high because a misuse could overwrite entire page contents across a wiki, potentially affecting many users and documents at scale.
From the tool's definition Update a page by id. Either replace the whole content, or apply surgical edits=[{find,replace}] to the existing content.
Attacks that exploit this kind of access
Update a page by id. Either replace the whole content, or apply surgical edits=[{find,replace}] to the existing content. Fields you omit are preserved (the current page is fetched first), so metadata-only updates never wipe content/tags. It is categorised as a Write tool in the Mcp Wikijs Mv MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Mcp Wikijs Mv MCP server in PolicyLayer and add a rule for wiki_page_update: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Mcp Wikijs Mv. Nothing to install.
wiki_page_update is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the wiki_page_update rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for wiki_page_update. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
wiki_page_update is provided by the Mcp Wikijs Mv MCP server (janschachtschabel/mcp-for-wiki-js). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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