Get a deal custom field by ID
AI agents call getDealCustomField 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.
The getDealCustomField tool queries and retrieves a specific custom field value associated with a deal. This is a straightforward read operation that accesses existing data without creating, modifying, deleting, or executing any actions. The blast radius of misuse is minimal — an AI agent could only over-query or expose field values to unauthorized parties, both low-impact scenarios in typical CRM security contexts.
From the tool's definition Tool name includes 'Get' and description states 'Get a deal custom field by ID' — retrieves data without modification or side effects.
Attacks that exploit this kind of access
Get a deal custom field by ID. 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 getDealCustomField: 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.
getDealCustomField 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 getDealCustomField 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 getDealCustomField. 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.
getDealCustomField 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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