Count rows in a configured source that match an optional Notion API filter.
AI agents call notion_source_count to retrieve information from Notion DB MCP Helper without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a counting operation on rows matching specified filters. Counting is a read-only operation that retrieves information from the database without creating, modifying, deleting, or executing side effects. The tool has minimal blast radius if misused by an AI agent—at worst, it returns inaccurate counts but causes no data loss or unintended modifications.
From the tool's definition Tool name 'notion_source_count' and description 'Count rows in a configured source that match an optional Notion API filter' indicate a query operation that retrieves aggregate data without modification or deletion.
Attacks that exploit this kind of access
Count rows in a configured source that match an optional Notion API filter. It is categorised as a Read tool in the Notion DB MCP Helper MCP Server, which means it retrieves data without modifying state.
Register the Notion DB MCP Helper MCP server in PolicyLayer and add a rule for notion_source_count: 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 DB MCP Helper. Nothing to install.
notion_source_count is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the notion_source_count 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_source_count. 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_source_count is provided by the Notion DB MCP Helper MCP server (trisetiohidayat/notion-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
Teams ship this data inside their own products. See what a licence covers →