AI agents call my_tool to retrieve information from PullNexus without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Without a description, we must infer from context. The tool is registered on a PullNexus server (GitHub-backed registry for AI resources). The name 'my_tool' is generic and non-descriptive. Given the lack of evidence and the server's primary purpose of searching, pulling, and managing resources (Read operations), defaulting to Read is reasonable. However, the empty description significantly lowers confidence.
From the tool's definition Tool name is 'my_tool' with no description provided. No clear indication of function or capability.
Documented attack patterns abuse exactly the kind of access my_tool gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and PullNexus, and nothing reaches the server without passing your rules. This is the rule we recommend for my_tool:
{
"version": "1",
"default": "deny",
"tools": {
"my_tool": {}
}
}my_tool is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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my_tool. It is categorised as a Read tool in the PullNexus MCP Server, which means it retrieves data without modifying state.
Register the PullNexus MCP server in PolicyLayer and add a rule for my_tool: 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 PullNexus. Nothing to install.
my_tool is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the my_tool 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 my_tool. 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.
my_tool is provided by the PullNexus MCP server (mrwillist/pullnexus). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from PullNexus, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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11 PullNexus tools catalogued and risk-classified — across an index of 43,000+ MCP servers.