Set a parameter value (e.g., target temperature). Only works for writable parameters. Check wem_get_parameter_meta for min/max values and enum options first.
Part of the Weishaupt WEM Portal server.
Free to start. No card required.
AI agents use wem_write_parameter to create or modify resources in Weishaupt WEM Portal. 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 wem_write_parameter 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 Weishaupt WEM Portal.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"wem_write_parameter": {
"limits": [
{
"counter": "wem_write_parameter_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Weishaupt WEM Portal policy for all 8 tools.
These attack patterns abuse exactly the kind of access wem_write_parameter 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.
Set a parameter value (e.g., target temperature). Only works for writable parameters. Check wem_get_parameter_meta for min/max values and enum options first.. It is categorised as a Write tool in the Weishaupt WEM Portal MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Weishaupt WEM Portal MCP server in PolicyLayer and add a rule for wem_write_parameter: 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 Weishaupt WEM Portal. Nothing to install.
wem_write_parameter 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 wem_write_parameter 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 wem_write_parameter. 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.
wem_write_parameter is provided by the Weishaupt WEM Portal MCP server (@disane-dev/weishaupt-wem-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 8 Weishaupt WEM Portal tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
4,600+ MCP servers and 31,000+ tools scanned and risk-classified.