Assign/publish a style to a layer. Args: layer_name (str): The target layer. style_name (str): The style to apply. workspace (str): Workspace context. Returns: dict: API response from publish.
AI agents use publish_style to create or update resources in GeoServer MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your GeoServer MCP Server environment.
This tool modifies layer properties (style assignment) reversibly without deleting data or executing arbitrary code. The operation changes visualization settings but does not destroy data, execute external commands, or move money. It qualifies as Write rather than Execute because it updates configuration state rather than triggering code execution.
From the tool's definition Tool description states 'Assign/publish a style to a layer' with parameters for layer_name, style_name, and workspace. The verb 'publish' combined with 'assign' indicates modification of layer configuration metadata.
Documented attack patterns abuse exactly the kind of access publish_style gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and GeoServer MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for publish_style:
{
"version": "1",
"default": "deny",
"tools": {
"publish_style": {
"limits": [
{
"counter": "publish_style_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}publish_style stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
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Assign/publish a style to a layer. Args: layer_name (str): The target layer. style_name (str): The style to apply. workspace (str): Workspace context. Returns: dict: API response from publish. It is categorised as a Write tool in the GeoServer MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the GeoServer MCP Server MCP server in PolicyLayer and add a rule for publish_style: 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 GeoServer MCP Server. Nothing to install.
publish_style 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 publish_style 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 publish_style. 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.
publish_style is provided by the GeoServer MCP Server MCP server (mahdin75/geoserver-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from GeoServer MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
56 GeoServer MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.