AI agents call query_database to retrieve information from Notion MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Querying a database retrieves or filters existing data without modification, matching the Read category definition. While the tool could expose sensitive information depending on access controls, the operation itself has no side effects on the database state. Severity is low because the impact is limited to information disclosure rather than data modification or system compromise.
From the tool's definition Tool name 'query_database' and description 'Query a database' indicate data retrieval. Sibling tools show this server supports create, update, and delete operations separately (create_database, update_block, delete_block).
Documented attack patterns abuse exactly the kind of access query_database gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Notion MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for query_database:
{
"version": "1",
"default": "deny",
"tools": {
"query_database": {}
}
}query_database is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Query a database. It is categorised as a Read tool in the Notion MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Notion MCP Server MCP server in PolicyLayer and add a rule for query_database: 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 MCP Server. Nothing to install.
query_database 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 query_database 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 query_database. 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.
query_database is provided by the Notion MCP Server MCP server (v-3/notion-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 13 Notion MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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13 Notion MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.