Distributed locking / semaphore for multi-agent coordination. Prevents race conditions when multiple agents operate on the same resource. Uses atomic file-based locks on mesh nodes.
AI agents invoke omniwire_semaphore to trigger actions in OmniWire. 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.
This tool creates and manages atomic file-based locks across distributed mesh nodes, which is an Execute-level operation — it triggers external operations (lock acquisition/release) on remote infrastructure that affect the behavior of multiple agents.
From the tool's definition Distributed locking / semaphore for multi-agent coordination... Uses atomic file-based locks on mesh nodes
Documented attack patterns abuse exactly the kind of access omniwire_semaphore gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and OmniWire, and nothing reaches the server without passing your rules. This is the rule we recommend for omniwire_semaphore:
{
"version": "1",
"default": "deny",
"tools": {
"omniwire_semaphore": {
"limits": [
{
"counter": "omniwire_semaphore_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}omniwire_semaphore 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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Distributed locking / semaphore for multi-agent coordination. Prevents race conditions when multiple agents operate on the same resource. Uses atomic file-based locks on mesh nodes. It is categorised as a Execute tool in the OmniWire MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the OmniWire MCP server in PolicyLayer and add a rule for omniwire_semaphore: 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 OmniWire. Nothing to install.
omniwire_semaphore 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 omniwire_semaphore 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 omniwire_semaphore. 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.
omniwire_semaphore is provided by the OmniWire MCP server (voidchecksum/omniwire). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from OmniWire, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
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