Update the system banner message settings
Part of the Binalyze AIR MCP Server server.
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AI agents use update_banner_message to create or modify resources in Binalyze AIR MCP Server. 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 update_banner_message 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 Binalyze AIR MCP Server.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"update_banner_message": {
"limits": [
{
"counter": "update_banner_message_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Binalyze AIR MCP Server policy for all 116 tools.
These attack patterns abuse exactly the kind of access update_banner_message 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.
Update the system banner message settings. It is categorised as a Write tool in the Binalyze AIR MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Binalyze AIR MCP Server MCP server in PolicyLayer and add a rule for update_banner_message: 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 Binalyze AIR MCP Server. Nothing to install.
update_banner_message 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 update_banner_message 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 update_banner_message. 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.
update_banner_message is provided by the Binalyze AIR MCP Server MCP server (binalyze/air-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 116 Binalyze AIR MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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