AI agents call misp_check_warninglists to retrieve information from Misp without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a lookup against warninglists to determine if an observable is known to be benign or a false positive. It retrieves information without creating, modifying, deleting, or executing anything. This is a classic Read operation: query existing data with no side effects.
From the tool's definition The tool description states it 'check[s] if an observable value appears on any MISP warninglists' — this is a query/lookup operation that retrieves data about whether a value matches known benign indicators.
Attacks that exploit this kind of access
Check if an observable value appears on any MISP warninglists (known benign/false positive lists). It is categorised as a Read tool in the Misp MCP Server, which means it retrieves data without modifying state.
Register the Misp MCP server in PolicyLayer and add a rule for misp_check_warninglists: 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 Misp. Nothing to install.
misp_check_warninglists 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 misp_check_warninglists 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 misp_check_warninglists. 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.
misp_check_warninglists is provided by the Misp MCP server (solomonneas/misp-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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