获取 CLS 告警回调配置列表。查询指定地域下的 Webhook 回调配置，用于在告警触发或恢复时向指定 URL 发送 HTTP 通知，常用于与第三方监控系统或自动化运维系统集成。 支持的过滤条件（Filters 参数）： - name: 按回调配置名称过滤 - callbackId: 按回调配置 ID 过滤 返回信息包含：CallbackId、Name、Url、Method、Headers、Body、CreateTime、UpdateTime 等。
Part of the Cls server.
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AI agents call DescribeWebCallbacks to retrieve information from Cls without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though DescribeWebCallbacks only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"DescribeWebCallbacks": {}
}
}See the full Cls policy for all 19 tools.
These attack patterns abuse exactly the kind of access DescribeWebCallbacks gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
获取 CLS 告警回调配置列表。查询指定地域下的 Webhook 回调配置，用于在告警触发或恢复时向指定 URL 发送 HTTP 通知，常用于与第三方监控系统或自动化运维系统集成。 支持的过滤条件（Filters 参数）： - name: 按回调配置名称过滤 - callbackId: 按回调配置 ID 过滤 返回信息包含：CallbackId、Name、Url、Method、Headers、Body、CreateTime、UpdateTime 等。. It is categorised as a Read tool in the Cls MCP Server, which means it retrieves data without modifying state.
Register the Cls MCP server in PolicyLayer and add a rule for DescribeWebCallbacks: 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 Cls. Nothing to install.
DescribeWebCallbacks 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 DescribeWebCallbacks 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 DescribeWebCallbacks. 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.
DescribeWebCallbacks is provided by the Cls MCP server (cls-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 19 Cls tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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