Run a pre-mortem failure analysis on a plan or task before execution. Returns failure modes with probability, impact, and mitigations. Use before committing to high-stakes plans.
Part of the Alexandria server.
Free to start. No card required.
AI agents invoke alexandria_premortem to trigger processes or run actions in Alexandria. 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.
alexandria_premortem 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": {
"alexandria_premortem": {
"limits": [
{
"counter": "alexandria_premortem_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}See the full Alexandria policy for all 20 tools.
These attack patterns abuse exactly the kind of access alexandria_premortem 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.
Run a pre-mortem failure analysis on a plan or task before execution. Returns failure modes with probability, impact, and mitigations. Use before committing to high-stakes plans.. It is categorised as a Execute tool in the Alexandria MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Alexandria MCP server in PolicyLayer and add a rule for alexandria_premortem: 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 Alexandria. Nothing to install.
alexandria_premortem 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 alexandria_premortem 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 alexandria_premortem. 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.
alexandria_premortem is provided by the Alexandria MCP server (mcp-server-alexandria). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 20 Alexandria 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.