create_harness

SERVERRokha SOURCEhttps://rokha.ai/mcp/jsonrpc

Medium RISK CLASS

Category Write

Parameters 53 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/ai-rokha-rokha/create-harness.md

WHAT IT DOES

What create_harness does on Rokha

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

Parameter	Type	Required	Description
`key`	string	Yes	Unique key for this harness within the wallet
`content`	string	Yes	Content/value of the harness
`metadata`	object	—	Optional metadata for the harness
`harness_type`	string	Yes	Type of harness
`wallet_address`	string	—	Wallet address that owns the harness

Parameters from the server's own tool schema.

RISK

Why create_harness is rated Medium

Creates persistent memory and execution rigs tied to a wallet; reversible but high-impact write.

From the tool's definition Create a new harness (persistent context memory) for a wallet

Risk signalsAccepts raw HTML/template content (content)

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs create_harness safely

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

create_harness Rate-limited

create_harness 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_harness": {
      "limits": [
        {
          "counter": "create_harness_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 Rokha, apply this rule, and every create_harness call is checked against it from then on.

FAQ

Questions about create_harness

What does the create_harness tool do? +

Create a new harness (persistent context memory) for a wallet. Also creates RIG STEPS (harness_type 'skill'/'instruction'): content is the step's JSON config — {skill?, instruction, endpoint?, tool?, params?, expects?, produces?, secret_refs?, model?, model_policy?}. model pins the Anthropic model for the step's agentic execution (e.g. 'claude-sonnet-4-6'); model_policy 'preferred' (default — swap to the best usable model when the pin isn't available) or 'required' (the step refuses to run without it, typed model_unavailable; non-Haiku models need the owner's own API key). It is categorised as a Write tool in the Rokha MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does create_harness accept? +

create_harness accepts 5 parameters: key, content, metadata, harness_type, wallet_address. Required: key, content, harness_type. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on create_harness? +

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

What risk level is create_harness? +

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

Can I rate-limit create_harness? +

Yes. Add a rate_limit block to the create_harness 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_harness completely? +

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

create_harness is provided by the Rokha MCP server (https://rokha.ai/mcp/jsonrpc). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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