create_conversation_field · SparrowDesk MCP: Risk & Policy

WHAT IT DOES

What create_conversation_field does on SparrowDesk

AI agents use create_conversation_field to create or update resources in SparrowDesk — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your SparrowDesk environment.

WHY IT NEEDS A POLICY

Why create_conversation_field needs a policy

This tool creates a new custom field for conversations, which is a write operation that modifies the conversation schema/configuration. It is reversible (fields can typically be deleted) and has a medium severity as misuse could clutter the conversation system with unwanted fields, but the blast radius is limited to conversation configuration rather than core data or financial operations.

From the tool's definition Tool name 'create_conversation_field' and description 'Create a custom conversation field' indicates creation of new data structure.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_conversation_field Rate-limited

create_conversation_field 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "create_conversation_field": {
      "limits": [
        {
          "counter": "create_conversation_field_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches SparrowDesk, so you can run agents against it safely.

FAQ

Questions about create_conversation_field

What does the create_conversation_field tool do? +

Create a custom conversation field (dropdown types require field_options). It is categorised as a Write tool in the SparrowDesk MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_conversation_field? +

Register the SparrowDesk MCP server in PolicyLayer and add a rule for create_conversation_field: 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 SparrowDesk. Nothing to install.

What risk level is create_conversation_field? +

create_conversation_field is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit create_conversation_field? +

Yes. Add a rate_limit block to the create_conversation_field 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.

How do I block create_conversation_field completely? +

Set action: deny in the PolicyLayer policy for create_conversation_field. 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.

What MCP server provides create_conversation_field? +

create_conversation_field is provided by the SparrowDesk MCP server (sparrowdesk/sparrowdesk-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.