AI agents call vtk_get_class_role to retrieve information from Vtkapi without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns information about VTK class properties without modifying any data, executing code, or triggering external operations. It is a pure metadata lookup function analogous to 'get' or 'fetch' operations. The blast radius of misuse is minimal—an AI agent could only receive incorrect classification information, not cause damage or execute unintended code.
From the tool's definition Tool retrieves metadata about VTK class pipeline roles with possible return values: input, filter, properties, renderer, scene, infrastructure, output, utility, color.
Attacks that exploit this kind of access
Get the pipeline role of a VTK class. Returns one of: input, filter, properties, renderer, scene, infrastructure, output, utility, color. It is categorised as a Read tool in the Vtkapi MCP Server, which means it retrieves data without modifying state.
Register the Vtkapi MCP server in PolicyLayer and add a rule for vtk_get_class_role: 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 Vtkapi. Nothing to install.
vtk_get_class_role 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 vtk_get_class_role 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 vtk_get_class_role. 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.
vtk_get_class_role is provided by the Vtkapi MCP server (patrickoleary/vtkapi-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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