arvan_s3_get_object
Download an object. Returns text, or base64 when as_base64 or binary.
This record as markdown: /tools/dwin-gharibi-arvancloud-mcp/arvan-s3-get-object.md
What arvan_s3_get_object does on ArvanCloud MCP Server
AI agents call arvan_s3_get_object to retrieve information from ArvanCloud MCP Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why arvan_s3_get_object is rated Low
This tool is a pure read operation on S3 storage. It fetches and returns an object's content in text or base64 format with no side effects. The download action does not modify, delete, or execute anything; it solely retrieves existing data. Even though ArvanCloud is a comprehensive cloud platform, this specific tool's function is limited to data retrieval, placing it in the Read category with low severity.
From the tool's definition "Download an object. Returns text, or base64 when as_base64 or binary." — Explicitly retrieves/downloads data without modifying or deleting it.
Attacks that exploit this kind of access
The rule that runs arvan_s3_get_object safely
PolicyLayer is an MCP gateway: it sits between your AI agents and ArvanCloud MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For arvan_s3_get_object, this is the rule to start with:
arvan_s3_get_object is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect ArvanCloud MCP Server, apply this rule, and every arvan_s3_get_object call is checked against it from then on.
Questions about arvan_s3_get_object
Download an object. Returns text, or base64 when as_base64 or binary. It is categorised as a Read tool in the ArvanCloud MCP Server MCP Server, which means it retrieves data without modifying state.
Register the ArvanCloud MCP Server MCP server in PolicyLayer and add a rule for arvan_s3_get_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 ArvanCloud MCP Server. Nothing to install.
arvan_s3_get_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 arvan_s3_get_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 arvan_s3_get_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.
arvan_s3_get_object is provided by the ArvanCloud MCP Server MCP server (dwin-gharibi/arvancloud-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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