Add a comment to a page or specific content. Creates a new comment. Provide page_id to identify the page, then choose ONE targeting mode: - page_id alone: Page-level comment on the entire page - page_id + selection_with_ellipsis: Comment on specific block content - discussion_id: Reply to an exis...
Risk signalsBulk/mass operation — affects multiple targets
Part of the Notion server.
Free to start. No card required.
AI agents use notion-create-comment to create or modify resources in Notion. 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 notion-create-comment 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 Notion.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"notion-create-comment": {
"limits": [
{
"counter": "notion-create-comment_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Notion policy for all 26 tools.
These attack patterns abuse exactly the kind of access notion-create-comment 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.
Add a comment to a page or specific content. Creates a new comment. Provide page_id to identify the page, then choose ONE targeting mode: - page_id alone: Page-level comment on the entire page - page_id + selection_with_ellipsis: Comment on specific block content - discussion_id: Reply to an existing discussion thread (page_id is still required) For content targeting, use selection_with_ellipsis with ~10 chars from start and end: "# Section Ti...tle content" <example description="Page-level comment"> {"page_id": "uuid", "rich_text": [{"text": {"content": "Comment"}}]} </example> <example description="Comment on specific content"> {"page_id": "uuid", "selection_with_ellipsis": "# Meeting No...es heading", "rich_text": [{"text": {"content": "Comment on this section"}}]} </example> <example description="Reply to discussion"> {"page_id": "uuid", "discussion_id": "discussion://pageId/blockId/discussionId", "rich_text": [{"text": {"content": "Reply"}}]} </example>. It is categorised as a Write tool in the Notion MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Notion MCP server in PolicyLayer and add a rule for notion-create-comment: 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 Notion. Nothing to install.
notion-create-comment 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 notion-create-comment 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 notion-create-comment. 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.
notion-create-comment is provided by the Notion MCP server (@notion-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 26 Notion tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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