Break down a complex task into smaller, verifiable sub-tasks
Part of the Vibecheck server.
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AI agents use prompt_plan_task to create or modify resources in Vibecheck. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.
Without a policy, an AI agent could call prompt_plan_task repeatedly, creating or modifying resources faster than any human could review. PolicyLayer's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Vibecheck.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"prompt_plan_task": {
"limits": [
{
"counter": "prompt_plan_task_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Vibecheck policy for all 103 tools.
These attack patterns abuse exactly the kind of access prompt_plan_task gives an agent. Each links to the full case and the policy that stops it:
Other write tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Break down a complex task into smaller, verifiable sub-tasks. It is categorised as a Write tool in the Vibecheck MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Vibecheck MCP server in PolicyLayer and add a rule for prompt_plan_task: 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 Vibecheck. Nothing to install.
prompt_plan_task is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the prompt_plan_task 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 prompt_plan_task. 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.
prompt_plan_task is provided by the Vibecheck MCP server (@vibecheckdev/vibecheck-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 103 Vibecheck tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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