Fetch Notion data source schema and list property names/types. Accepts alias or raw data_source_id.
AI agents call notion_db_schema 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.
The tool fetches and returns schema information (property names and types) from a Notion database. This is a read-only operation with no data modification, deletion, code execution, or financial impact. The action is non-destructive and informational in nature, consistent with the Read category definition of 'retrieves or queries data; no side effects.'
From the tool's definition Tool description explicitly states 'Fetch Notion data source schema and list property names/types' — purely retrieves metadata without modification or side effects.
Attacks that exploit this kind of access
Fetch Notion data source schema and list property names/types. Accepts alias or raw data_source_id. 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_schema: 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_schema 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_schema 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_schema. 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_schema 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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