AI agents call tigris_list_objects to retrieve information from Tigris without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves a list of objects stored in a Tigris bucket. It performs no write, delete, execute, or financial operations—purely data retrieval with no side effects. The blast radius of misuse is minimal: an attacker could discover what files exist in a bucket, but cannot modify, delete, or execute them.
From the tool's definition Tool name 'tigris_list_objects' and description 'List all objects in a buckets' indicate retrieval of bucket contents without modification.
Attacks that exploit this kind of access
List all objects in a buckets. It is categorised as a Read tool in the Tigris MCP Server, which means it retrieves data without modifying state.
Register the Tigris MCP server in PolicyLayer and add a rule for tigris_list_objects: 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 Tigris. Nothing to install.
tigris_list_objects 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 tigris_list_objects 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 tigris_list_objects. 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.
tigris_list_objects is provided by the Tigris MCP server (@tigrisdata/tigris-mcp-server). 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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