Compare with the baseline image (and mask). * @param[in] img The input image * @param[in] region The input region, to limit the region of the comparison on the input image * and also exclude some not-care pixels. * @param[out] diffResult The pixel-level difference image in the same format as ...
Part of the Leaper Vision Toolkit MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.
AI agents use image_compare_compare to create or modify resources in Leaper Vision Toolkit. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.
Without a policy, an AI agent could call image_compare_compare repeatedly, creating or modifying resources faster than any human could review. Intercept's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Leaper Vision Toolkit.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
tools:
image_compare_compare:
rules:
- action: allow
rate_limit:
max: 30
window: 60See the full Leaper Vision Toolkit policy for all 169 tools.
Agents calling write-class tools like image_compare_compare have been implicated in these attack patterns. Read the full case and prevention policy for each:
Other tools in the Write risk category across the catalogue. The same policy patterns (rate-limit, validate) apply to each.
Compare with the baseline image (and mask). * @param[in] img The input image * @param[in] region The input region, to limit the region of the comparison on the input image * and also exclude some not-care pixels. * @param[out] diffResult The pixel-level difference image in the same format as the input image * and same size as the input region (or the input image if the region is empty) * @param[out] maskResult @bin_image @bit8 The pixel-level difference mask, white pixels represent those differences exceed #PixelTolerance 与基准图像（和蒙版）进行比较。 * @param[in] img 输入的图像 * @param[in] region 输入的区域，用于限定比较区域在输入图像中的位置，和剔除无关像素 * @param[out] diffResult 像素差异图，图像类型与输入图像相同，尺寸与输入区域相同（若输入区域为空，则与输入图像相同） * @param[out] maskResult @bin_image @bit8 像素差异蒙版图，白色像素表示差异大于 #PixelTolerance 与基准图像（和蒙版）进行比较。 没有设置基准图像时，需要让用户先通过 ImageCompareSetBaseline 设置基准图像。 返回结构是一个序列化的json，其中： DiffResultImg属性是差异图像URL地址， MaskResultImg属性是差异蒙版图像URL地址. 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.
Add a rule in your Intercept YAML policy under the tools section for image_compare_compare. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the Leaper Vision Toolkit MCP server.
image_compare_compare 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 image_compare_compare rule in your Intercept 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 Intercept policy for image_compare_compare. 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.
image_compare_compare is provided by the Leaper Vision Toolkit MCP server (leaper-mcp/leaper-mcp-proxy). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic policy on every MCP tool call. Per-identity grants. Full audit log.