Union two regions. 将当前ROI区域与输入的区域进行与操作。 The new region contains all parts from both input regions. 新的区域包含当前区域和输入区域中所包含的所有部分。 This operation is equivalent to the Add operation. 此操作与 Add() 操作相同。 If a non-empty region is unioned with an empty region, a copy of the original region is returned. 一个非空区域...
AI agents use il_region_union to create or update resources in Leaper Vision Toolkit — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Leaper Vision Toolkit environment.
| Parameter | Type | Required | Description |
|---|---|---|---|
regionClassObjDescriptionJson | string | — | 原始的Roi区域。传入一个序列化的JSON字符串，属性包括：LpvClassName(调用工具函数的名称) 和 InputParameterFile(调用工具函数需要传入的参数文件名称)。这两个属性的值可以从前处理的MCP工具的返回值中获取。LpvClassName 表示要调用的Region接口名称，根据不同的区域类型 |
otherRegionClassObjDescriptionJson | string | — | 输入用于与操作的ROI区域。传入一个序列化的JSON字符串，属性包括：LpvClassName(调用工具函数的名称) 和 InputParameterFile(调用工具函数需要传入的参数文件名称)。这两个属性的值可以从前处理的MCP工具的返回值中获取。LpvClassName 表示要调用的Region接口名称，根据不同 |
Parameters from the server's own tool schema.
The tool creates or combines region objects and outputs their representation. While it processes image metadata (regions/ROI), it does not execute code, delete data irreversibly, or access financial systems. The union operation is a standard geometric/data combination that produces new region objects—characteristic of Write operations. The modification is reversible (regions can be modified again).
From the tool's definition Tool performs a union operation on two regions, creating 'a new composite ROI region object' and 'outputs a description JSON'. This modifies/creates region data structures (ROI = Region of Interest), which is a reversible data transformation.
Attacks that exploit this kind of access
Union two regions. 将当前ROI区域与输入的区域进行与操作。 The new region contains all parts from both input regions. 新的区域包含当前区域和输入区域中所包含的所有部分。 This operation is equivalent to the Add operation. 此操作与 Add() 操作相同。 If a non-empty region is unioned with an empty region, a copy of the original region is returned. 一个非空区域与空区域求与，获得该区域对象的拷贝。 并输出一个新的复合ROI区域对象(ILCompoundRegion类型)的描述JSON。 其中ILCompoundRegion类型继承于ILRegion类型. It is categorised as a Write tool in the Leaper Vision Toolkit MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
il_region_union accepts 2 parameters: regionClassObjDescriptionJson, otherRegionClassObjDescriptionJson. The full parameter table on this page comes from the server's own tool schema.
Register the Leaper Vision Toolkit MCP server in PolicyLayer and add a rule for il_region_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 Leaper Vision Toolkit. Nothing to install.
il_region_union is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the il_region_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 il_region_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.
il_region_union is provided by the Leaper Vision Toolkit MCP server (leaper-mcp/leaper-mcp-proxy). 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.
Teams ship this data inside their own products. See what a licence covers →