Get object metadata without downloading content
AI agents call minio_stat_object to retrieve information from MinIO MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves object metadata (stat/status information) from S3-compatible storage without downloading, modifying, or deleting data. It is a non-destructive query operation with minimal blast radius—even if misused by an agent, it only exposes metadata visibility without operational consequences.
From the tool's definition Tool name 'minio_stat_object' and description 'Get object metadata without downloading content' indicate a read-only operation that retrieves metadata only, with no modification or side effects.
Attacks that exploit this kind of access
Get object metadata without downloading content. It is categorised as a Read tool in the MinIO MCP Server MCP Server, which means it retrieves data without modifying state.
Register the MinIO MCP Server MCP server in PolicyLayer and add a rule for minio_stat_object: 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 MinIO MCP Server. Nothing to install.
minio_stat_object 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 minio_stat_object 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 minio_stat_object. 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.
minio_stat_object is provided by the MinIO MCP Server MCP server (raphaelren/minio-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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