List the counterparty
AI agents call list_investment_positions to retrieve information from Mcp Afip without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves investment position data and counterparty information for the AFIP Argentine tax authority context. It performs a query operation with no side effects, no data creation, modification, or deletion. The blast radius of misuse is limited to unauthorized data access, which is lower risk than write/destructive/financial operations.
From the tool's definition Tool name 'list_investment_positions' and description 'List the counterparty' indicate data retrieval without modification. The verb 'list' is a read operation that queries or retrieves information.
Documented attack patterns abuse exactly the kind of access list_investment_positions gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Mcp Afip, and nothing reaches the server without passing your rules. This is the rule we recommend for list_investment_positions:
{
"version": "1",
"default": "deny",
"tools": {
"list_investment_positions": {}
}
} list_investment_positions is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List the counterparty. It is categorised as a Read tool in the Mcp Afip MCP Server, which means it retrieves data without modifying state.
Register the Mcp Afip MCP server in PolicyLayer and add a rule for list_investment_positions: 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 Mcp Afip. Nothing to install.
list_investment_positions 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_investment_positions 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_investment_positions. 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_investment_positions is provided by the Mcp Afip MCP server (codespar/mcp-dev-latam). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Mcp Afip, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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1300 Mcp Afip tools catalogued and risk-classified — across an index of 43,000+ MCP servers.