add_behavioral_rule

Add a behavioral rule that shapes how the assistant responds. Use when the user wants explicit do/don

SERVERCoWork OS SOURCECoWork-OS/CoWork-OS

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/cowork-os/add-behavioral-rule.md

WHAT IT DOES

What add_behavioral_rule does on CoWork OS

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

RISK

Why add_behavioral_rule is rated Medium

This tool creates or modifies behavioral rules that govern assistant responses. It is a Write operation because it creates or stores configuration data that affects future behavior, but reversibly (rules can typically be deleted or modified).

From the tool's definition Tool description states 'Add a behavioral rule' — the word 'Add' indicates creation of a new configuration rule.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs add_behavioral_rule safely

PolicyLayer is an MCP gateway: it sits between your AI agents and CoWork OS, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For add_behavioral_rule, this is the rule to start with:

add_behavioral_rule Rate-limited

add_behavioral_rule 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": {
    "add_behavioral_rule": {
      "limits": [
        {
          "counter": "add_behavioral_rule_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect CoWork OS, apply this rule, and every add_behavioral_rule call is checked against it from then on.

FAQ

Questions about add_behavioral_rule

What does the add_behavioral_rule tool do? +

Add a behavioral rule that shapes how the assistant responds. Use when the user wants explicit do/don. It is categorised as a Write tool in the CoWork OS MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on add_behavioral_rule? +

Register the CoWork OS MCP server in PolicyLayer and add a rule for add_behavioral_rule: 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 CoWork OS. Nothing to install.

What risk level is add_behavioral_rule? +

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

Can I rate-limit add_behavioral_rule? +

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

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

add_behavioral_rule is provided by the CoWork OS MCP server (CoWork-OS/CoWork-OS). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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