Set behavioral policy for a skill (allow/deny rules for runtime monitoring). Args: skill_name: Name of the skill to set policy for policy_json: JSON string with policy rules. Fields: allowed_tools: list of tool names allowed (null = all) denied_files: list of glob patterns for denied file access ...
Part of the Arc Security server.
Free to start. No card required.
AI agents use set_monitor_policy to create or modify resources in Arc Security. 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 set_monitor_policy 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 Arc Security.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"set_monitor_policy": {
"limits": [
{
"counter": "set_monitor_policy_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Arc Security policy for all 14 tools.
These attack patterns abuse exactly the kind of access set_monitor_policy 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 behavioral policy for a skill (allow/deny rules for runtime monitoring). Args: skill_name: Name of the skill to set policy for policy_json: JSON string with policy rules. Fields: allowed_tools: list of tool names allowed (null = all) denied_files: list of glob patterns for denied file access denied_networks: list of patterns for denied network targets max_events_per_minute: rate limit (integer). It is categorised as a Write tool in the Arc Security MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Arc Security MCP server in PolicyLayer and add a rule for set_monitor_policy: 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 Arc Security. Nothing to install.
set_monitor_policy 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 set_monitor_policy 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 set_monitor_policy. 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.
set_monitor_policy is provided by the Arc Security MCP server (arc-security-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 14 Arc Security tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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