Create a hash-chained provenance record for an action you've taken. Each attestation extends the append-only evidence chain. The hash can be independently verified by any third party. Cost: $0.02 per call.
Part of the Kevros — Agentic Identity Trust server.
Free to start. No card required.
AI agents use attest to create or modify resources in Kevros — Agentic Identity Trust. 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 attest 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 Kevros — Agentic Identity Trust.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"attest": {
"limits": [
{
"counter": "attest_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Kevros — Agentic Identity Trust policy for all 9 tools.
These attack patterns abuse exactly the kind of access attest 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.
Create a hash-chained provenance record for an action you've taken. Each attestation extends the append-only evidence chain. The hash can be independently verified by any third party. Cost: $0.02 per call.. It is categorised as a Write tool in the Kevros — Agentic Identity Trust MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Kevros — Agentic Identity Trust MCP server in PolicyLayer and add a rule for attest: 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 Kevros — Agentic Identity Trust. Nothing to install.
attest 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 attest 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 attest. 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.
attest is provided by the Kevros — Agentic Identity Trust MCP server (https://governance.taskhawktech.com/mcp/). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 9 Kevros — Agentic Identity Trust 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.