获取可选的城市公司列表（单选）。需要选择城市公司时调用此工具，返回的 branchId 和 cityCode 作为其他工具（如 contract_data_report_export）的必填参数。支持按关键词搜索和直营城市预设筛选。
Part of the Yjzf server.
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AI agents use branch_select to create or modify resources in Yjzf. 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 branch_select repeatedly, creating or modifying resources faster than any human could review. PolicyLayer's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Yjzf.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"branch_select": {
"limits": [
{
"counter": "branch_select_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Yjzf policy for all 16 tools.
These attack patterns abuse exactly the kind of access branch_select gives an agent. Each links to the full case and the policy that stops it:
Other write tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
获取可选的城市公司列表（单选）。需要选择城市公司时调用此工具，返回的 branchId 和 cityCode 作为其他工具（如 contract_data_report_export）的必填参数。支持按关键词搜索和直营城市预设筛选。. It is categorised as a Write tool in the Yjzf MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Yjzf MCP server in PolicyLayer and add a rule for branch_select: 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 Yjzf. Nothing to install.
branch_select 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 branch_select 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 branch_select. 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.
branch_select is provided by the Yjzf MCP server (@yjzf/mcp-server-yjzf). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 16 Yjzf tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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