AI agents invoke previous to trigger actions in MCP Windows. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.
Given the server's media playback control capabilities and the sibling tool 'get_media_sessions', 'previous' most likely triggers a 'previous track' media playback action. This is an Execute category action as it triggers an external operation (media player control). Confidence is low due to the empty description.
From the tool's definition Tool name 'previous' with empty description; server context includes media playback control
Documented attack patterns abuse exactly the kind of access previous gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and MCP Windows, and nothing reaches the server without passing your rules. This is the rule we recommend for previous:
{
"version": "1",
"default": "deny",
"tools": {
"previous": {
"limits": [
{
"counter": "previous_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}previous stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
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previous. It is categorised as a Execute tool in the MCP Windows MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the MCP Windows MCP server in PolicyLayer and add a rule for previous: 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 MCP Windows. Nothing to install.
previous is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the previous 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 previous. 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.
previous is provided by the MCP Windows MCP server (secretiveshell/mcp-windows). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from MCP Windows, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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28 MCP Windows tools catalogued and risk-classified — across an index of 43,000+ MCP servers.