This API call returns an array of stock or ETF exchanges available at Twelve Data API. This list is updated daily.
AI agents call GetExchanges to retrieve information from Twelve Data 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 reference data about available exchanges from the Twelve Data API. It performs a simple lookup/query operation with no ability to modify, delete, execute, or affect financial transactions. The blast radius if misused by an AI agent is minimal—at worst, it returns static metadata that could inform decision-making but cannot cause direct harm. This is a canonical Read operation.
From the tool's definition GetExchanges returns an array of stock or ETF exchanges; it queries available exchange data with no side effects or modifications.
Documented attack patterns abuse exactly the kind of access GetExchanges gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Twelve Data MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for GetExchanges:
{
"version": "1",
"default": "deny",
"tools": {
"GetExchanges": {}
}
}GetExchanges is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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This API call returns an array of stock or ETF exchanges available at Twelve Data API. This list is updated daily. It is categorised as a Read tool in the Twelve Data MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Twelve Data MCP Server MCP server in PolicyLayer and add a rule for GetExchanges: 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 Twelve Data MCP Server. Nothing to install.
GetExchanges 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 GetExchanges 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 GetExchanges. 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.
GetExchanges is provided by the Twelve Data MCP Server MCP server (twelvedata/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 186 Twelve Data MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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186 Twelve Data MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.