RECENT MODEL ADDITIONS + UPDATES from the Promptibus catalog (default: last 7 days). Use whenever you need to know if a newer/better model is available for the task — replaces 'I'll just use the one I know about' fail mode. Surfaces new models the user might want to try before committing to defau...
Part of the Promptibus MCP server.
Free to start. No card required.
AI agents invoke whats_new to trigger processes or run actions in Promptibus MCP. Execute operations can have side effects beyond the immediate call -- triggering builds, sending notifications, or starting workflows. Rate limits and argument validation are essential to prevent runaway execution.
whats_new can trigger processes with real-world consequences. An uncontrolled agent might start dozens of builds, send mass notifications, or kick off expensive compute jobs. PolicyLayer enforces rate limits and validates arguments to keep execution within safe bounds.
Execute tools trigger processes. Rate-limit and validate arguments to prevent unintended side effects.
{
"version": "1",
"default": "deny",
"tools": {
"whats_new": {
"limits": [
{
"counter": "whats_new_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}See the full Promptibus MCP policy for all 12 tools.
These attack patterns abuse exactly the kind of access whats_new gives an agent. Each links to the full case and the policy that stops it:
Other execute tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
RECENT MODEL ADDITIONS + UPDATES from the Promptibus catalog (default: last 7 days). Use whenever you need to know if a newer/better model is available for the task — replaces 'I'll just use the one I know about' fail mode. Surfaces new models the user might want to try before committing to defaults. Free, no plan gate.. It is categorised as a Execute tool in the Promptibus MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Promptibus MCP server in PolicyLayer and add a rule for whats_new: 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 Promptibus MCP. Nothing to install.
whats_new is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the whats_new 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 whats_new. 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.
whats_new is provided by the Promptibus MCP server (@promptibus/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 12 Promptibus MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
4,600+ MCP servers and 31,000+ tools scanned and risk-classified.