This record as markdown: /tools/hybridlabor-api-aos/boolean-union.md
What boolean_union does on Aos
AI agents invoke boolean_union to trigger actions in Aos. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.
Why boolean_union is rated High
Based on the server context (PyVista 3D visualization) and sibling tools like 'boolean_intersection' and 'boolian_difference', this tool likely performs a boolean union operation combining two 3D meshes into a single geometry. This is a computational/geometric operation (Execute category) rather than a simple read or write.
From the tool's definition Tool name 'boolean_union' on a PyVista 3D visualization server; description is empty and uninformative.
Attacks that exploit this kind of access
The rule that runs boolean_union safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Aos, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For boolean_union, this is the rule to start with:
boolean_union stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Aos, apply this rule, and every boolean_union call is checked against it from then on.
Questions about boolean_union
boolean_union is a execute tool on the Aos MCP server. It is categorised as a Execute tool in the Aos MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Aos MCP server in PolicyLayer and add a rule for boolean_union: 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 Aos. Nothing to install.
boolean_union is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the boolean_union 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 boolean_union. 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.
boolean_union is provided by the Aos MCP server (@hybridlabor-api/aos). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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