List text messages. FUB REQUIRES at least one filter: personId, threadId, phone, toNumber, fromNumber, sharedInboxId, groupTextId, participants, or id list. Unfiltered calls return 400.
AI agents call listTextMessages to retrieve information from Follow Up Boss MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a straightforward query/list operation that retrieves text message records from the CRM system. While it accesses potentially sensitive communication data, the operation itself is read-only with no capability to modify, delete, or execute any action. The required filters ensure data scope is constrained.
From the tool's definition Tool name is 'listTextMessages' and description states 'List text messages', which is a retrieval operation with no side effects. The tool filters and returns existing data without modification.
Attacks that exploit this kind of access
List text messages. FUB REQUIRES at least one filter: personId, threadId, phone, toNumber, fromNumber, sharedInboxId, groupTextId, participants, or id list. Unfiltered calls return 400. It is categorised as a Read tool in the Follow Up Boss MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Follow Up Boss MCP Server MCP server in PolicyLayer and add a rule for listTextMessages: 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 Follow Up Boss MCP Server. Nothing to install.
listTextMessages 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 listTextMessages 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 listTextMessages. 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.
listTextMessages is provided by the Follow Up Boss MCP Server MCP server (nerdsnipe-inc/follow-up-boss-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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