Count rows in a Notion data source by one exact property match, using schema-aware filter construction.
AI agents call notion_db_count_by_property 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 retrieves aggregate information (row count) from a Notion database based on filter criteria. It has no side effects—it does not create, modify, delete, or execute arbitrary operations. The function is purely informational, making it a Read category tool with low severity since misuse would only expose count data without enabling destructive or financial harm.
From the tool's definition Tool performs a count operation filtered by property match on a Notion database. The description emphasizes 'Count rows' and 'exact property match', indicating a query-only operation with no mutation of data.
Attacks that exploit this kind of access
Count rows in a Notion data source by one exact property match, using schema-aware filter construction. 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_db_count_by_property: 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_db_count_by_property 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_db_count_by_property 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_db_count_by_property. 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_db_count_by_property 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.
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