AI agents call get_patterns to retrieve information from Archive Agent without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves pattern configuration (inclusion/exclusion rules) from the Archive Agent. It is a pure read operation with no side effects, no code execution, and no data modification. The low severity reflects minimal risk—exposure of pattern configuration is informational only.
From the tool's definition Tool name 'get_patterns' and description 'Get the list of included / excluded patterns' indicate a retrieval operation that queries configuration or metadata without modifying data.
Documented attack patterns abuse exactly the kind of access get_patterns gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Archive Agent, and nothing reaches the server without passing your rules. This is the rule we recommend for get_patterns:
{
"version": "1",
"default": "deny",
"tools": {
"get_patterns": {}
}
}get_patterns is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get the list of included / excluded patterns. It is categorised as a Read tool in the Archive Agent MCP Server, which means it retrieves data without modifying state.
Register the Archive Agent MCP server in PolicyLayer and add a rule for get_patterns: 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 Archive Agent. Nothing to install.
get_patterns 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 get_patterns 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 get_patterns. 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.
get_patterns is provided by the Archive Agent MCP server (shredengineer/archive-agent). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 7 Archive Agent tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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7 Archive Agent tools catalogued and risk-classified — across an index of 42,500+ MCP servers.