AI agents use label_add_at to create or update resources in AudacityMCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your AudacityMCP environment.
This tool creates new labels (annotations/markers) in an Audacity audio project at specified time positions. Labels are metadata that organize and annotate audio content but do not modify the actual audio data itself. The action is reversible (labels can be deleted or edited).
From the tool's definition Tool name 'label_add_at' and description 'Add a label at a specific time range' indicate creation of metadata (labels) within an audio project. The verb 'add' is explicitly write-oriented.
Documented attack patterns abuse exactly the kind of access label_add_at gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and AudacityMCP, and nothing reaches the server without passing your rules. This is the rule we recommend for label_add_at:
{
"version": "1",
"default": "deny",
"tools": {
"label_add_at": {
"limits": [
{
"counter": "label_add_at_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}label_add_at stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
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Add a label at a specific time range. It is categorised as a Write tool in the AudacityMCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Audacity MCP server in PolicyLayer and add a rule for label_add_at: 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 AudacityMCP. Nothing to install.
label_add_at 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 label_add_at 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 label_add_at. 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.
label_add_at is provided by the Audacity MCP server (xdarkzx/audacity-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 131 AudacityMCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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131 AudacityMCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.