Calculate Gibraltar Payments on Account. Splits the annual corporate tax liability into two equal payments due 28 February and 30 September. Provide either lastYearTax or lastYearProfit with optional taxRate.
Part of the Company Gibraltar server.
Free to start. No card required.
AI agents use poa_calculator to create or modify resources in Company Gibraltar. 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 poa_calculator 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 Company Gibraltar.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"poa_calculator": {
"limits": [
{
"counter": "poa_calculator_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Company Gibraltar policy for all 6 tools.
These attack patterns abuse exactly the kind of access poa_calculator 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.
Calculate Gibraltar Payments on Account. Splits the annual corporate tax liability into two equal payments due 28 February and 30 September. Provide either lastYearTax or lastYearProfit with optional taxRate.. It is categorised as a Write tool in the Company Gibraltar MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Company Gibraltar MCP server in PolicyLayer and add a rule for poa_calculator: 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 Company Gibraltar. Nothing to install.
poa_calculator 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 poa_calculator 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 poa_calculator. 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.
poa_calculator is provided by the Company Gibraltar MCP server (company-gibraltar-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 6 Company Gibraltar tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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