Estimate credits for a Cannon Studio generation request before creating billable work. Requires OAuth or a developer API key; it may update key/token usage metadata but does not spend credits, enqueue jobs, or change assets. Use get_api_operation first if operation or input fields are unclear, th...
Part of the Cannon Studio server.
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AI agents use estimate_generation_cost to create or modify resources in Cannon Studio. 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 estimate_generation_cost 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 Cannon Studio.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"estimate_generation_cost": {
"limits": [
{
"counter": "estimate_generation_cost_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Cannon Studio policy for all 15 tools.
These attack patterns abuse exactly the kind of access estimate_generation_cost 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.
Estimate credits for a Cannon Studio generation request before creating billable work. Requires OAuth or a developer API key; it may update key/token usage metadata but does not spend credits, enqueue jobs, or change assets. Use get_api_operation first if operation or input fields are unclear, then pass the same operation/input pair to create_generation_request after user approval.. It is categorised as a Write tool in the Cannon Studio MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Cannon Studio MCP server in PolicyLayer and add a rule for estimate_generation_cost: 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 Cannon Studio. Nothing to install.
estimate_generation_cost 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 estimate_generation_cost 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 estimate_generation_cost. 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.
estimate_generation_cost is provided by the Cannon Studio MCP server (https://www.cannonstudio.app/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 15 Cannon Studio tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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