sms_schedule
A write tool on the Twilio SMS MCP server.
This record as markdown: /tools/0x-professor-twilio-mcp-server/sms-schedule.md
What sms_schedule does on Twilio SMS MCP Server
AI agents use sms_schedule to create or update resources in Twilio SMS MCP Server, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Twilio SMS MCP Server environment.
Why sms_schedule is rated Medium
This tool creates or modifies data (schedules messages) reversibly—scheduled messages can be cancelled via sms_cancel_scheduled. It does not delete data irreversibly or execute arbitrary code, making it Write rather than Destructive or Execute.
From the tool's definition Tool name 'sms_schedule' combined with server description stating it 'send[s], receive[s], schedule[s], and manage[s] SMS and MMS messages.' The sibling tool 'sms_cancel_scheduled' confirms scheduling capability. Tool enables creation of scheduled messages.
Attacks that exploit this kind of access
The rule that runs sms_schedule safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Twilio SMS MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For sms_schedule, this is the rule to start with:
sms_schedule stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Twilio SMS MCP Server, apply this rule, and every sms_schedule call is checked against it from then on.
Questions about sms_schedule
sms_schedule is a write tool on the Twilio SMS MCP Server MCP server. It is categorised as a Write tool in the Twilio SMS MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Twilio SMS MCP Server MCP server in PolicyLayer and add a rule for sms_schedule: 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 Twilio SMS MCP Server. Nothing to install.
sms_schedule is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the sms_schedule 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 sms_schedule. 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.
sms_schedule is provided by the Twilio SMS MCP Server MCP server (0x-professor/twilio-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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