AI agents call get_assistant_texml to retrieve information from Telnyx 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 existing assistant configuration data (TEXML format) by identifier. It performs no creation, modification, deletion, or external execution—purely a query operation. Severity is low because unauthorized retrieval of assistant configuration, while potentially exposing internal logic, does not directly cause financial loss, delete data, or execute arbitrary operations.
From the tool's definition Tool name 'get_assistant_texml' and description 'Get an assistant's TEXML by ID' indicate a retrieval operation with no mutation or side effects.
Documented attack patterns abuse exactly the kind of access get_assistant_texml gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Telnyx MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_assistant_texml:
{
"version": "1",
"default": "deny",
"tools": {
"get_assistant_texml": {}
}
}get_assistant_texml is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Get an assistant's TEXML by ID. It is categorised as a Read tool in the Telnyx MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Telnyx MCP Server MCP server in PolicyLayer and add a rule for get_assistant_texml: 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 Telnyx MCP Server. Nothing to install.
get_assistant_texml 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_assistant_texml 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_assistant_texml. 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_assistant_texml is provided by the Telnyx MCP Server MCP server (team-telnyx/telnyx-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Telnyx MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
46 Telnyx MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.