Get a list of all available DiVA API view endpoints with metadata.
AI agents call list_available_views to retrieve information from Marqeta DiVA API 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 and enumerates available API views and their metadata. It performs a simple informational query with no side effects, data modification, financial transactions, destructive operations, or arbitrary code execution. The blast radius of misuse is minimal—an attacker gains only knowledge of available endpoints, which is typically already documented or discoverable through other means.
From the tool's definition Tool name 'list_available_views' and description 'Get a list of all available DiVA API view endpoints with metadata' indicate a retrieval operation that returns metadata about available endpoints with no data modification, deletion, or execution of external…
Attacks that exploit this kind of access
Get a list of all available DiVA API view endpoints with metadata. It is categorised as a Read tool in the Marqeta DiVA API MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Marqeta DiVA API MCP Server MCP server in PolicyLayer and add a rule for list_available_views: 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 Marqeta DiVA API MCP Server. Nothing to install.
list_available_views 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 list_available_views 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 list_available_views. 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.
list_available_views is provided by the Marqeta DiVA API MCP Server MCP server (zvika-finally/marqeta-diva-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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