List deal custom fields
AI agents call listDealCustomFields 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 tool retrieves or lists metadata about custom fields associated with deals. It performs no mutations, side effects, or external operations—it simply returns structured data. This is a standard Read operation with minimal blast radius if misused by an AI agent.
From the tool's definition Tool name 'listDealCustomFields' and description 'List deal custom fields' indicate a retrieval operation that queries existing custom field definitions without modifying data.
Attacks that exploit this kind of access
List deal custom fields. 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 listDealCustomFields: 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.
listDealCustomFields 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 listDealCustomFields 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 listDealCustomFields. 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.
listDealCustomFields 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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