Generates regional distribution maps, which are usually used to show the administrative divisions and coverage of a dataset. It is not suitable for showing the distribution of specific locations, such as urban administrative divisions, GDP distribution maps of provinces and cities across the coun...
Risk signalsHigh parameter count (18 properties) · Admin/system-level operation
Part of the Chart server.
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AI agents use generate_district_map to create or modify resources in Chart. 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 generate_district_map 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 Chart.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"generate_district_map": {
"limits": [
{
"counter": "generate_district_map_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Chart policy for all 27 tools.
These attack patterns abuse exactly the kind of access generate_district_map 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.
Generates regional distribution maps, which are usually used to show the administrative divisions and coverage of a dataset. It is not suitable for showing the distribution of specific locations, such as urban administrative divisions, GDP distribution maps of provinces and cities across the country, etc. This tool is limited to generating data maps within China.. It is categorised as a Write tool in the Chart MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Chart MCP server in PolicyLayer and add a rule for generate_district_map: 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 Chart. Nothing to install.
generate_district_map 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 generate_district_map 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 generate_district_map. 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.
generate_district_map is provided by the Chart MCP server (antvis/mcp-server-chart). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 27 Chart tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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