crewai_define_agent · CrewAI MCP Orchestrator MCP

WHAT IT DOES

What crewai_define_agent does on CrewAI MCP Orchestrator

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

WHY IT NEEDS A POLICY

Why crewai_define_agent needs a policy

Based on the tool name alone, 'define_agent' most likely creates or configures an agent within a CrewAI project, which is a Write operation. The sibling tools context (create_project, define_task, edit_crew_py) suggests this is part of a project-building workflow. However, confidence is low due to the empty description — it could also trigger agent execution depending on implementation.

From the tool's definition Tool name 'crewai_define_agent' suggests defining/creating an agent configuration; description is empty and uninformative.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

crewai_define_agent Rate-limited

crewai_define_agent 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": {
    "crewai_define_agent": {
      "limits": [
        {
          "counter": "crewai_define_agent_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 CrewAI MCP Orchestrator, so you can run agents against it safely.

FAQ

Questions about crewai_define_agent

What does the crewai_define_agent tool do? +

crewai_define_agent. It is categorised as a Write tool in the CrewAI MCP Orchestrator MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on crewai_define_agent? +

Register the CrewAI MCP Orchestrator MCP server in PolicyLayer and add a rule for crewai_define_agent: 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 CrewAI MCP Orchestrator. Nothing to install.

What risk level is crewai_define_agent? +

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

Can I rate-limit crewai_define_agent? +

Yes. Add a rate_limit block to the crewai_define_agent 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 crewai_define_agent completely? +

Set action: deny in the PolicyLayer policy for crewai_define_agent. 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 crewai_define_agent? +

crewai_define_agent is provided by the CrewAI MCP Orchestrator MCP server (ssolis-ti/crewai-mcp-hq). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.