notion_append_block_children

WHAT IT DOES

What notion_append_block_children does on MCP Notion Server (@suncreation)

AI agents use notion_append_block_children to create or update resources in MCP Notion Server (@suncreation) — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your MCP Notion Server (@suncreation) environment.

WHY IT NEEDS A POLICY

Why notion_append_block_children needs a policy

This tool adds new content blocks to an existing Notion page or block. It creates/modifies data but is reversible (blocks can be deleted). The max 100 blocks limit and nesting constraints confirm it's a content write operation with moderate blast radius if misused to flood pages with unwanted content.

From the tool's definition Append child blocks to a parent

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

notion_append_block_children Rate-limited

notion_append_block_children stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "notion_append_block_children": {
      "limits": [
        {
          "counter": "notion_append_block_children_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches MCP Notion Server (@suncreation), so you can run agents against it safely.

FAQ

Questions about notion_append_block_children

What does the notion_append_block_children tool do? +

Append child blocks to a parent. Max 100 blocks, 2 nesting levels. It is categorised as a Write tool in the MCP Notion Server (@suncreation) MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on notion_append_block_children? +

Register the MCP Notion Server (@suncreation) MCP server in PolicyLayer and add a rule for notion_append_block_children: 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 Notion Server (@suncreation). Nothing to install.

What risk level is notion_append_block_children? +

notion_append_block_children is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit notion_append_block_children? +

Yes. Add a rate_limit block to the notion_append_block_children 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.

How do I block notion_append_block_children completely? +

Set action: deny in the PolicyLayer policy for notion_append_block_children. 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.

What MCP server provides notion_append_block_children? +

notion_append_block_children is provided by the MCP Notion Server (@suncreation) MCP server (suncreation/mcp-notion-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.