Get the complete taxonomic hierarchy (from Kingdom down to Species) for a given TSN.
AI agents call get_hierarchy to retrieve information from ITIS 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 and queries taxonomic hierarchy information based on a TSN (Taxonomic Serial Number) identifier. There are no side effects, data modifications, code execution, or destructive operations. It is a straightforward read operation on a scientific database with no blast radius if misused by an AI agent.
From the tool's definition Tool description states 'Get the complete taxonomic hierarchy' with no modification capabilities. The verb 'Get' and the read-only nature of retrieving hierarchical data from a taxonomic database indicate pure data retrieval.
Attacks that exploit this kind of access
Get the complete taxonomic hierarchy (from Kingdom down to Species) for a given TSN. It is categorised as a Read tool in the ITIS MCP Server MCP Server, which means it retrieves data without modifying state.
Register the ITIS MCP Server MCP server in PolicyLayer and add a rule for get_hierarchy: 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 ITIS MCP Server. Nothing to install.
get_hierarchy 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_hierarchy 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_hierarchy. 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_hierarchy is provided by the ITIS MCP Server MCP server (knustx/itis-mcp-server). 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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