AI agents use rename_media to create or update resources in Listmonk MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Listmonk MCP Server environment.
This tool modifies a media file's title/name, which is a reversible write operation on metadata. It does not delete data (ruling out Destructive), does not execute code or trigger external operations (ruling out Execute), does not move money (ruling out Financial), and does not retrieve data (ruling out Read).
From the tool's definition Tool name 'rename_media' and description 'Rename/update the title of a media file' indicate modification of metadata rather than creation of new data or deletion. The operation is reversible—a media file can be renamed again.
Documented attack patterns abuse exactly the kind of access rename_media gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Listmonk MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for rename_media:
{
"version": "1",
"default": "deny",
"tools": {
"rename_media": {
"limits": [
{
"counter": "rename_media_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}rename_media 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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Rename/update the title of a media file. It is categorised as a Write tool in the Listmonk MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Listmonk MCP Server MCP server in PolicyLayer and add a rule for rename_media: 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 Listmonk MCP Server. Nothing to install.
rename_media 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 rename_media 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 rename_media. 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.
rename_media is provided by the Listmonk MCP Server MCP server (rhnvrm/listmonk-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 29 Listmonk MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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29 Listmonk MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.