Fetch the list of ransomware groups with available YARA rules.
AI agents call fetch_yara_rules_list_tool to retrieve information from Ransomware Analysis MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves metadata about which ransomware groups have YARA rules available. It performs a read-only query operation with no side effects, no data modification, and no code execution. The data returned is informational for cybersecurity investigation and monitoring purposes. This is consistent with other sibling tools on the server that fetch data (fetch_group_data_tool, fetch_iocs_tool, etc.).
From the tool's definition Tool name includes 'fetch' and description states 'Fetch the list' - purely retrieving/querying data about available YARA rules. No modification, deletion, or execution of rules.
Attacks that exploit this kind of access
Fetch the list of ransomware groups with available YARA rules. It is categorised as a Read tool in the Ransomware Analysis MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Ransomware Analysis MCP Server MCP server in PolicyLayer and add a rule for fetch_yara_rules_list_tool: 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 Ransomware Analysis MCP Server. Nothing to install.
fetch_yara_rules_list_tool 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 fetch_yara_rules_list_tool 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 fetch_yara_rules_list_tool. 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.
fetch_yara_rules_list_tool is provided by the Ransomware Analysis MCP Server MCP server (mohamedouamer19/ransomware_scraper). 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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