Create a Request For Information in ACC Build's RFIs module via the APS Construction RFIs v1 API, in 'draft' status. Returns the ACC rfi_id. When to use: a trade or subcontractor needs formal information from the design team (unclear detail, conflicting spec, missing dimension) and you want a tra...
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AI agents use acc_create_rfi to create or modify resources in ScanBIM MCP. 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 acc_create_rfi 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 ScanBIM MCP.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"acc_create_rfi": {
"limits": [
{
"counter": "acc_create_rfi_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full ScanBIM MCP policy for all 19 tools.
These attack patterns abuse exactly the kind of access acc_create_rfi 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.
Create a Request For Information in ACC Build's RFIs module via the APS Construction RFIs v1 API, in 'draft' status. Returns the ACC rfi_id. When to use: a trade or subcontractor needs formal information from the design team (unclear detail, conflicting spec, missing dimension) and you want a tracked paper trail. When NOT to use: the item is just a punchlist fix — use acc_create_issue. The question is internal to one trade — handle inside that trade's toolchain. APS scopes: data:read data:write account:read Rate limits: APS default ~50 req/min per app per endpoint; Model Derivative translation jobs ~60 req/min; OSS uploads size-limited per file to 100MB for direct upload, larger via resumable. Errors: 401 APS token expired/invalid — refresh; 403 scope or resource permission denied (app not provisioned for the project's ACC account, or RFIs module not enabled); 404 project_id not found — check the ID; 429 rate limited — backoff and retry; 5xx APS upstream outage — retry with jitter. Side effects: NON-IDEMPOTENT. Creates a new draft RFI each call. Inserts a row into D1 usage_log.. It is categorised as a Write tool in the ScanBIM MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the ScanBIM MCP server in PolicyLayer and add a rule for acc_create_rfi: 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 ScanBIM MCP. Nothing to install.
acc_create_rfi 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 acc_create_rfi 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 acc_create_rfi. 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.
acc_create_rfi is provided by the ScanBIM MCP server (https://scanbim-mcp.itmartin24.workers.dev/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 19 ScanBIM MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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