Map Core API transaction tokens to DiVA report transaction tokens.
AI agents call get_transaction_token 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 or maps transaction token identifiers between two systems. It performs a read-only lookup operation with no side effects, no code execution, and no data modification. The context of a financial reporting API (DiVA) suggests this is a data retrieval utility for normalizing transaction references between Core API and reporting systems.
From the tool's definition Tool name 'get_transaction_token' and description 'Map Core API transaction tokens to DiVA report transaction tokens' indicate a lookup/retrieval operation that translates between token identifiers without modifying, deleting, or executing external operations.
Attacks that exploit this kind of access
Map Core API transaction tokens to DiVA report transaction tokens. 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 get_transaction_token: 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.
get_transaction_token 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 get_transaction_token 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 get_transaction_token. 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.
get_transaction_token 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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