Returns the changes between two versions of a wiki page as a compact text diff. Each side accepts a revision ID, page title (latest revision), or supplied wikitext; text-vs-text is rejected. Only the changes are returned over the wire. For the full text of both sides, fetch with get-page instead....
Part of the MediaWiki MCP Server server.
Free to start. No card required.
AI agents use compare-pages to create or modify resources in MediaWiki MCP Server. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.
Without a policy, an AI agent could call compare-pages repeatedly, creating or modifying resources faster than any human could review. PolicyLayer's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach MediaWiki MCP Server.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"compare-pages": {
"limits": [
{
"counter": "compare-pages_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full MediaWiki MCP Server policy for all 22 tools.
These attack patterns abuse exactly the kind of access compare-pages gives an agent. Each links to the full case and the policy that stops it:
Other write tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Returns the changes between two versions of a wiki page as a compact text diff. Each side accepts a revision ID, page title (latest revision), or supplied wikitext; text-vs-text is rejected. Only the changes are returned over the wire. For the full text of both sides, fetch with get-page instead. If a title or revision ID does not exist, an error is returned. Set includeDiff=false for a cheap change-detection response that skips diff rendering and returns just the change flag, revision metadata, and size delta. Diff output is truncated at 50000 bytes with a trailing marker; a narrower revision range or includeDiff=false avoids truncation.. It is categorised as a Write tool in the MediaWiki MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the MediaWiki MCP Server MCP server in PolicyLayer and add a rule for compare-pages: 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 MediaWiki MCP Server. Nothing to install.
compare-pages 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 compare-pages 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 compare-pages. 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.
compare-pages is provided by the MediaWiki MCP Server MCP server (@professional-wiki/mediawiki-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 22 MediaWiki MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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