Find one document in a MongoDB collection
AI agents call mongo_find_one to retrieve information from Mcp Database without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool performs a read-only operation that queries and returns a single document from MongoDB. It has no side effects, does not execute arbitrary code, does not modify data, and does not delete or move resources. It fits the Read category: retrieves or queries data with no side effects. Severity is low because the blast radius of misuse is limited to information disclosure of existing data.
From the tool's definition Tool name 'mongo_find_one' and description 'Find one document in a MongoDB collection' indicate a query operation that retrieves data without modification.
Attacks that exploit this kind of access
Find one document in a MongoDB collection. It is categorised as a Read tool in the Mcp Database MCP Server, which means it retrieves data without modifying state.
Register the Mcp Database MCP server in PolicyLayer and add a rule for mongo_find_one: 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 Database. Nothing to install.
mongo_find_one 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 mongo_find_one 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 mongo_find_one. 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.
mongo_find_one is provided by the Mcp Database MCP server (nam088/mcp-database-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
mongo_find_one is one line of Mcp Database's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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