This API call returns an array of bonds available at Twelve Data API. This list is updated daily.
AI agents call GetBonds 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.
GetBonds retrieves financial instrument metadata (bonds) from the Twelve Data API without side effects. The tool queries existing data and presents it to the caller—a classic Read operation. No data is created, modified, deleted, or executed. The low severity reflects that merely listing available bonds poses minimal risk to misuse by an AI agent.
From the tool's definition Tool returns an array of bonds with no mention of modification, deletion, or execution capabilities. Description states it 'returns an array' and the list is 'updated daily' by the service, not by the caller. This is a data retrieval operation.
Documented attack patterns abuse exactly the kind of access GetBonds 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 GetBonds:
{
"version": "1",
"default": "deny",
"tools": {
"GetBonds": {}
}
}GetBonds 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 bonds 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 GetBonds: 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.
GetBonds 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 GetBonds 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 GetBonds. 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.
GetBonds 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.