Paid tier only. Calling this without an authenticated CivilQuants account returns TIER_INSUFFICIENT — sign up at https://civilquants.com/pricing or use the free-tier alternative compute_manhole. Precast concrete box culvert run (Marshalls / FP McCann / CPM ranges, BS EN 14844 / BS 5911-3) of one ...
Risk signalsHigh parameter count (43 properties)
Part of the Civilquants server.
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AI agents invoke compute_box_culvert to trigger processes or run actions in Civilquants. Execute operations can have side effects beyond the immediate call -- triggering builds, sending notifications, or starting workflows. Rate limits and argument validation are essential to prevent runaway execution.
compute_box_culvert can trigger processes with real-world consequences. An uncontrolled agent might start dozens of builds, send mass notifications, or kick off expensive compute jobs. PolicyLayer enforces rate limits and validates arguments to keep execution within safe bounds.
Execute tools trigger processes. Rate-limit and validate arguments to prevent unintended side effects.
{
"version": "1",
"default": "deny",
"tools": {
"compute_box_culvert": {
"limits": [
{
"counter": "compute_box_culvert_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}See the full Civilquants policy for all 52 tools.
These attack patterns abuse exactly the kind of access compute_box_culvert gives an agent. Each links to the full case and the policy that stops it:
Other execute tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Paid tier only. Calling this without an authenticated CivilQuants account returns TIER_INSUFFICIENT — sign up at https://civilquants.com/pricing or use the free-tier alternative compute_manhole. Precast concrete box culvert run (Marshalls / FP McCann / CPM ranges, BS EN 14844 / BS 5911-3) of one of eight catalogue sizes from BC_600 (600 × 600mm) to BC_3000x2000 (3000 × 2000mm). Composes the precast units (N per run), concrete blinding bedding, geotextile separator, selected granular surround per SHW Cl. 503, and foundation excavation with optional sheet pile support. Optional headwall_attenuation_outlet (2nd use of S21) at each termination with independently parameter-selectable scour protection (rock armour, gabion mattress, concrete apron, or none). Routes BOX_CULVERT_UNIT via CESMM4 H.7.3/.4/.5 (precast concrete, size banded), NRM2 33.8.1/.2/.3, MMHW 500.12.1/.2/.3 (with Series 2500 signpost for large units per Volume 4 NG 25), and SMM7 R12.4.5/.6/.7. Example params: total_length_m=12 m (1–200), invert_depth_m=2.5 m (0.5–15), invert_gradient=0.005 (0–0.08). Example call: {"params": {"total_length_m": 12, "invert_depth_m": 2.5, "invert_gradient": 0.005}, "standard": "MMHW"}. Omitted parameters use sensible engineering defaults. Pass deliverables=["xlsx"] to also receive a one-shot Excel BoQ download URL in the same call.. It is categorised as a Execute tool in the Civilquants MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Civilquants MCP server in PolicyLayer and add a rule for compute_box_culvert: 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 Civilquants. Nothing to install.
compute_box_culvert is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the compute_box_culvert 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 compute_box_culvert. 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.
compute_box_culvert is provided by the Civilquants MCP server (https://api.civilquants.com/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 52 Civilquants tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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