Pull a batch of recent ISIR events (insolvency register publications) since the given event id. ISIR is an append-only feed — each call returns up to ~1000 events newer than since_id. Use last_id from response as next since_id. Useful for compliance monitoring or to back-fill an index.
Part of the Isir server.
Free to start. No card required.
AI agents call poll_isir_events to retrieve information from Isir without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though poll_isir_events only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"poll_isir_events": {}
}
}See the full Isir policy for all 3 tools.
These attack patterns abuse exactly the kind of access poll_isir_events gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Pull a batch of recent ISIR events (insolvency register publications) since the given event id. ISIR is an append-only feed — each call returns up to ~1000 events newer than since_id. Use last_id from response as next since_id. Useful for compliance monitoring or to back-fill an index.. It is categorised as a Read tool in the Isir MCP Server, which means it retrieves data without modifying state.
Register the Isir MCP server in PolicyLayer and add a rule for poll_isir_events: 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 Isir. Nothing to install.
poll_isir_events is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the poll_isir_events 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 poll_isir_events. 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.
poll_isir_events is provided by the Isir MCP server (https://isir.cz-agents.dev/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 3 Isir tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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